I just submitted a few suggestions regarding the WCF/REST implementation. If you feel the same, please vote on them. If you don't agree with them, please leave a comment, I'd love to hear some thoughts on these issues.

REST/WCF Automatic Selection of Formatter Based On Accept & Content Type Headers

REST/WCF UriTemplate Querystring Parameter Name Case Sensitivity

REST/WCF UriTemplate Optional Querystring Parameters