I work on the Entity Framework Team at Microsoft.
When I announced the start of the Entity Framework Toolkits & Extensions section in CodeGallery, Colin already had a big chunk of what he is now making available in the works. And so I had it in my mind when I defined the Entity Framework Toolkits & Extensions as a collection of source code and tools to augment EF's capabilities and extend its reach to new scenarios.
It took Colin 2 months to get some free time (readying a product for release is no easy task), to write some extra functionality (the custom materializer was first introduced a couple of weeks ago) and to get his code properly reviewed, etc.
I would like to recommend you to go and download EFExtensions from the project page at CodeGallery, and then enjoy Colin's first blog post explaining some of the stuff the current EFExtensions are good for.
By the way, one of my my favorite parts of the project is the EntitySet class and its GetTrackedEntities() method :)
Alex already introduced Colin as one super smart colleague. In fact, I cannot stress enough how smart Colin is. He is the uber developer. But I must add that intelligence is not his only quality!
Please, send us feedback on this. The most straightforward way is to use the Discussion tool in CodeGallery, but feel free to use the email links in our blogs.
And expect some really cool new EF Tools & Extensions form Colin and other members of the team. I know what I am talking about! :)