Usually I write in this blog about Business Intelligence without too much consideration for "traditional" access to SQL Server. However, in a parallel universe I also wrote a book about LINQ and now that we are in full Christmas mode, I hope you may be interested that you can download the Introducing Microsoft LINQ book for free!!
I wrote this book with Paolo based on Beta 1. Some contents are now outdated, but general concepts and 80% of the syntax is still valid. And, remember, now it's free, so you shouldn't claim too much! We are currently working on a more advanced and complete book about LINQ (Programming Microsoft LINQ), which is expected to be available by mid-May 2008.
Have a good read, a Merry Christmas and a Happy New Year!