At this week's Virtual Brown Bag meeting, Claudio Lassala started out by pointing us to a post on his blog expanding on last week's Liskov Substitution Principle discussion, then talked about two useful tools/sites: CutePDF and ExtensionMethod.net.
The top vote getter on the VBB site's "suggest a topic" page is DDD, so the remainder of the meeting was spent discussing Dorks, Dungeons and Dragons Domain Driven Design.
The DDD discussion quickly turned to the topic of Command Query Responsibility Separation (CQRS). See the VBB wiki page for a ton of links to blogs, podcasts and videos on the subject from brainiacs like Udi Dahan, Greg Young, Chris Tavares and Mark Nijhof.
For detailed notes, links, and the video recording, go to the VBB wiki page
https://sites.google.com/site/vbbwiki/main_page/2010-11-04.