As you may have heard, the LINQ(Language Integrated Query) Project was announced publicly today at PDC. There will be a lot more information coming throughout the week, but here's the resources available as of today.
Overview
DLinq
XLinq
Visual Basic
C#
Microsoft LINQ Bloggers
Upcoming Chats
UPDATE: Added Dinesh, Matt and Luca to the bloggers list.
UPDATE 2: Added Rob, Erik, and Amanda to the bloggers list.