I found a guide to quickly launch MSDN, but it lacks some explanations and other useful things.
Do you know where I can find a good tutorial for someone familiar with Linq-to-SQL but interested in EF?
You can start with some of the video tutorials from msdn found here , and in parallel you can study the following book: Entity Framework 4.0 Recipes: An Approach to Solving Problems (expert voice in .Net)
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Like marc_s, Julie has some good info. I recommend http://tekpub.com/production/ef for an excellent source of EF4 information, and then of course my favorite blog on the topic http://blogs.msdn.com/b/efdesign/
Here is a book about the Amazon:
Programming Entity Framework, Paperback
I must confess, though: I know little about it.