I’ve uploaded an initial version of LinqtoCRM to CodePlex. It’s a proof-of-concept more than anything else, but it will handle some non-trivial queries (like joins). The goal of the project is to abstract away CRM’s (necessarily) clunky web service interface and unleash the amazing application platform underneath. While I’ve worked with Linq as part of my thesis for the last couple of months, I managed to throw this code together over the weekend. If you have good examples and a bit of compiler-knowledge, creating your own queryprovider is not overly hard.