Additional LINQ resources
Zain, over at Second Life, just posted some of his "fundamental" LINQ learning resources:
http://blogs.msdn.com/zainnab/archive/2008/03/29/collection-of-linq-resources.aspx
While you're over there take a look at his Visual Studio 2008 / Framework 3.5 Learning Resources page:
http://blogs.msdn.com/zainnab/pages/visual-studio-2008-framework-3-5-learning-resources-page.aspx
I'm going to be posting LINQ resources from time to time.
Working with LINQ is something I'm really enjoying. (Honest)
If you'd like to pickup a study book I highly recommend LINQ in Action:
http://www.amazon.com/LINQ-Action-Fabrice-Marguerie/dp/1933988169/
LINQ is indeed a technology for Business use but it's also a great tool for hobbyists.
Take for example all the gaming sites on-line...
Many of those sites have public features they'd like to disconnect from their Database server.
LINQ is also great for that...Allow your users to vent in a Shoutbox but dump the comments into a disconnected XML file. 
By the way...You've seen these free Videos, right?
http://asp.net/learn/linq-videos/
Salute,
Mark Wisecarver
Microsoft Technical Evangelist for http://discountasp.net