There are a couple of online developer resources that have really stood out. I’ve benefited from them greatly so I wanted to give them a shout out.

Blogging communities:

CodeBetter.com – As an aside Matthew Podwysocki blogs here. So if your interested in all sorts of functional goodness, this is the place for you.
LosTechies.com
Devlicio.us

Webcasts:

DimeCasts.net – This site, run by Derik Whittaker and contributed to by a bunch of really smart people, has a ton of great web casts around ten minutes each (Great for those with ADD) on different topics. Topics include IoC, NHibernate, TDD, CI, SOLID and a bunch of other snazzy acronyms. Lately I’ve been watching vids on NHibernate and StructureMap and they have been extremely helpful.