This was a wonderful geekSpeak, with lots of good questions from attendees and some fascinating demos by our guest. Here are the follow-up resources
Watch the recording
LiveMeeting - https://www.livemeeting.com/cc/mseventsbmo/view?id=1032352641&role=attend&pw=C7397762
Channel 9 - geekSpeak Recording- LINQ to SharePoint with Bart De Smet
Useful Resources
The LINQ to SharePoint project - http://www.codeplex.com/LINQtoSharepoint
Overview of LINQ - http://msdn.microsoft.com/data/ref/linq/
Overview of LINQ to SQL - http://weblogs.asp.net/scottgu/archive/2007/05/19/using-linq-to-sql-part-1.aspx
Overview of CAML - http://msdn2.microsoft.com/en-us/library/ms426449.aspx
How to build a provider- described step by step at Matt Warren’s blog
Part I - Reusable IQueryable base classesPart II - Where and reusable Expression tree visitorPart II - Local variable referencesPart IV - SelectPart V - Improved Column bindingPart VI - Nested queriesPart VII - Join and SelectManyPart VIII - OrderBy