Being a sharing, caring guy, here's 170 or so PR resource links. These have been collected over a number of years, and I don't check them regularly, so some will be "dead", and I don't have the time to make them active links, so you'll have to copy and paste. I've listed them in response to a post (can't remember where) by Richard Bailey, who was responding to another post.
GENERAL PR
http://www.prfirms.org/
http://www.forward-moving.com/
http://aboutpublicrelations.net/aa042901a.htm
http://en.wikipedia.org/wiki/Public_relations#History
http://www.alternet.org/
http://www.mallenbaker.net/csr/index.html
http://www.b2bpublicrelations.org/
http://www.cios.org/
http://www.disinfopedia.org/wiki.phtml
http://www.issuemanagement.org/
http://www.middleberg.com/home_static_frame.html
http://www.prmuseum.com/
http://www.netaction.org/
http://www.natterjackpr.com/
http://www.patronsaintpr.com/
http://www.poynter.org/
http://www.prnewswire.com/
http://prtalk.prpn.com/
http://www.prweb.com/
http://www.sinicom.com/
http://www.spinproject.org/
http://www.liszt.com/
http://www.globalpr.org/
http://www.managementhelp.org/pblc_rel/pblc_rel.htm
http://www.mediamiser.com/resources/
http://forward-moving.com/contribute.html
http://dmoz.org/Business/Marketing_and_Advertising/Public_Relations/
http://www.gabriellereillyweekly.com/
http://www.jwcom.com/iabcpresent/
http://www.lobbywatch.org/p1temp.asp?pid=30&page=1
http://trevorcook.typepad.com/
US-SPECIFIC
http://www.instituteforpr.org/
http://www.prweek.com/us/
http://www.prnewsonline.com/
http://www.prwatch.org/
http://www.natcom.org/nca/Template2.asp
http://hb.burson-marsteller.com/
http://www.iabc.com/
http://www.ipra.org/
http://www.niri.org/
http://www.prsa.org/
http://www.ontherecordpodcast.com/pr/otro/default.aspx
http://seeit.mit.edu/organizationalpractices.asp
http://www.prsalasvegas.com/rssnews.php
http://www.au.af.mil/au/awc/awcgate/awcmedia.htm
http://www.bulldogreporter.com/ME2/Default.asp
UK-SPECIFIC
http://www.prweek.com/uk/
http://www.cipr.co.uk/
AUSTRALIA
http://www.prinfluences.com.au/
http://prtalkback.com/
http://publicaffairs.alliance.org.au/
http://www.leehopkins.net/
http://www.pria.com.au/resources/cid/1/t/resources#blogs
http://www.theaustralian.news.com.au/media/
http://www.crikey.com.au/
http://www.pria.com.au/
http://www.pria.com.au/member/links.html
http://www.accpa.com.au/
http://groups.yahoo.com/group/Australian-PR-Network/
http://www.anzca.net/
http://businessnetwork.smh.com.au/sales_marketing.html
http://www.abc.net.au/rn/mediareport/default.htm
http://praxis.massey.ac.nz/prism_on-line_journ.html
http://cserver.com.au/mglive/default.asp
http://www.usq.edu.au/masscomm/resources/course_resourses/public_relations.htm
http://www.frocomm.com.au/links.html
http://www.plugger.com.au/news/Public_Relations_Industry
PR PODCASTS
http://www.insidepr.ca/
http://www.edelman.com/podcasts/
http://prjunctionpodcast.com/
http://www.prweek.com/us/podcasts/
http://www.edelmanapac.com/index.jsp?series=21
http://www.mogulus.com/
http://www.bivingsreport.com/2006/pr-firms-that-blog-an-update/
http://prjunctionpodcast.com/
INTERNATIONAL PR
http://www.caslon.com.au/index.htm
http://www.aboutpublicrelations.net/international.htm
http://www.colorado.edu/conflict/peace/treatment/xcolcomm.htm
http://www.cultsock.ndirect.co.uk/MUHome/cshtml/index.html
http://www.nationalgeographic.com/xpeditions/lessons/10/g912/globalization.html
http://www.globalisationguide.org/07.html
http://www.globalpolicy.org/globaliz/cultural/
http://www.abc.net.au/global/default.htm
http://www.bbc.co.uk/radio4/reith/
http://www.globalization101.org/
http://www.globalpolicy.org/
http://www.culture-at-work.com/
e-PR
http://www.propenmic.org/
http://www.socialmediatoday.com/
http://sncr.org/
http://blogsearch.google.com/
http://www.online-pr.com/
http://www.newsdigitalmedia.com.au/index.html
http://www.wilsonweb.com/cat/cat.cfm?page=1&subcat=mp_PR
http://blog.e-fluentials.com/
http://badpitch.blogspot.com/
http://technorati.com/
http://vids.myspace.com/
http://www.ctvperth.com.au/
http://www.globalprblogweek.com/
http://searchenginewatch.com/
http://simplespark.com/
http://doodle.ch/main.html
http://aboutcommunicatie.nl/Search_Engine_Watch
PR STUDIES (for students)
http://www.nku.edu/~turney/prclass/index.htm
http://www.journoz.com/pol.html
http://www.cuttingedgepr.com/free_articles.asp
http://www.instituteforpr.com/
http://www.nku.edu/~turney/prclass/readings/
http://lamar.colostate.edu/~pr/
http://lamar.colostate.edu/~aejmcpr/teach.htm
http://lamar.colostate.edu/~hallahan/research.htm
http://faculty.buffalostate.edu/smithrd/
http://aboutpublicrelations.net/basics.htm
http://prbooks.pbwiki.com/
http://www.uwgb.edu/clampitp/
http://www.managementclarity.com/big_bibliography.htm
http://www.comm287.com/handouts.htm
http://www.comm387.com/
http://www.ipra.org/
http://carbon.cudenver.edu/~mryder/itc/comm_theory.html
http://www.tcw.utwente.nl/theorieenoverzicht/
http://comm.colorado.edu/deetz/commtheory.html
http://www.pria.com.au/resources/cid/76/parent/0/t/resources
http://www.cuttingedgepr.com/free_articles.asp
http://www.prinfluences.com.au/index.php?theParent=6&pagMan=1
http://www.corporatewatch.org/?lid=1570
http://sarkoracaille.blogspot.com/2007/06/century-of-self-14-adam-curtis-bbc-2002.html
http://www.uiowa.edu/~commstud/resources/
http://books.google.com/
http://podcast.prtopics.com/
http://www.toprankblog.com/
http://badpitch.blogspot.com/
http://www.edelman.com/summit07/
http://www.newcommreview.com/
http://lamar.colostate.edu/~pr/
http://www.nku.edu/~turney/prclass/index.htm
http://www.comm.umd.edu/people/faculty/lgrunig.html
http://www2.hawaii.edu/~tkell/
http://www.comm.umd.edu/
http://www.aber.ac.uk/media/
http://www.evancarmichael.com/Public-Relations/
http://teaching.berkeley.edu/compendium/
http://www.marin.edu/buscom/index.htm
http://lamar.colostate.edu/~hallahan/resources.htm
http://prbooks.pbwiki.com/
http://com.hilbert.edu/curriculum/
http://www.khake.com/page66.html
http://www.socialpsychology.org/teaching.htm
PR RESEARCH
http://slate.it.utk.edu/~dob/index.html
http://www.cios.org/www/tocs/JPR.htm
http://www.quantcast.com/
http://attentionmeter.com/
http://lamar.colostate.edu/~pr/
http://journalsportsmedia.blogspot.com/
http://www.cios.org/www/tocs/JPR.htm
PR BLOGS
http://www.prlab.com.au/prblog/
http://www.problogger.net/
http://www.irishblogs.ie/categories/e-pr/
http://lmighton.wordpress.com/tag/e-pr/
http://blog.holtz.com/index.php
http://www.mwwstraighttalk.com/
http://glasshouse.waggeneredstrom.com/blogs/frankshaw/default.aspx
http://www.globalprblogweek.com/
http://prblog.typepad.com/
http://prstudies.typepad.com/
http://greenbanana.wordpress.com/
http://corpcomm.prblogs.org/
http://nakedpr.com/
http://www.wallydownundy.com/