CRM 4.0 and Dynamics GP 10 connector
Did you know that the Dynamics CRM-GP 10 connector has already been released and that is Free? Yup... you can find all the information that you need in the GP's team blog here: https://mbs.microsoft.com/customersource/worldwide/us/productinformation/factsheets/MDCRMGPAdapter
I haven't personally dowloaded/tried the connector but I imagine that a ton of partners will be anxious to give it a try.