RubyBlogs and such
Other blogs & wikis:
AYE Conference [http://www.ayeconference.com/wiki/scribble.cgi wiki] and [http://www.ayeconference.com/ blog]
Jerry Weinberg's [http://www.geraldmweinberg.com/shape.html SHAPE Forum] and [http://weinbergonwriting.blogspot.com/ writing] and [http://secretsofconsulting.blogspot.com/ consulting] blogs
Esther Derby's [http://www.estherderby.com/weblog/blogger.html insights you can use]
Johanna Rothman's [http://www.jrothman.com/weblog/blogger.html management blog] and [http://www.jrothman.com/weblog/htpblogger.html hiring blog]
Don Gray's [http://donaldegray.com/ TikiWiki] & [http://donaldegray.com/blog/blog.html blog]
Alan C. Francis' [http://blog.alancfrancis.com/ blog]
James Shore's [http://jamesshore.com/Blog/ blog]
Alistair Cockburn's [http://alistair.cockburn.us/index.php/Special:Recentchanges wiki] and [http://alistair.cockburn.us/index.php/Category:Blog_entries_by_date blog]
Christian Sepulveda's [http://www.christiansepulveda.com/agileblog/ Agile Ramblings]
[http://martinfowler.com/bliki/ Martin Fowler]'s bliki
[http://www.xprogramming.com/Blog/Page.aspx Ron Jeffries]' blog
[http://www.dhemery.com/cwd/ Dale Emery]'s blog
[http://c2.com/cgi/wiki Ward Cunningham's C2 wiki] a.k.a. the Portland Pattern Repository. This is where the wiki concept was born. Unfortunately, it seems to have become inhabited by people who have a lot of time on their hands (and therefore can overwhelm other users), but are more interested in wikis and philosophy than in writing articles about software development. Flamewars and misinformation abound, and make the useful content hard to find.
The [http://blogs.objectmentor.com/FrontPage Object Mentor] blogs: Uncle Bob, James Grenning, Bob Koss, Michael Feathers, Micah Martin, David Chelimsky
[http://bossavit.com/thoughts/ Laurent Bossavit]'s blog
[http://www.testing.com/cgi-bin/blog Brian Marick]'s blog
[http://daveastels.com/ Dave Astels]' [http://blog.daveastels.com/ blog]
[http://www.artima.com/weblogs/index.jsp?blogger=beckel Bruce Eckel]'s blog
J.B.Rainsberger's [http://www.diasparsoftware.com/weblog/ old blog] & [http://www.jbrains.info/weblog/browse new blog]
Jeff McKenna's [http://homepage.mac.com/themckennas/iblog/B473316818/index.html Agile Action blog]
[http://www.williamcaputo.com/ William Caputo]'s blog
[http://www.twelve71.org/blogs/rachel/ Rachel Davies]' blog
[http://blog.qualityaspect.com/ Lidor Wyssocky]'s blog
My, this list is getting long....
[http://blogcarnival.com/bc/cprof_115.html The Carnival of the Agilists]
[http://www.artima.com/ Artima Developer] community, and [http://www.artima.com/weblogs/index.jsp weblogs]
[http://www.agile2007.org/ Agile2007], [http://www.agile2006.org/ Agile2006], [http://agile2005.org/ Agile2005]
Agile Project Management http://www.deadfishsociety.org/
[http://theagileblog.net/ Rally Software blog]
[http://www.developerdotstar.com/ developer.*]