Limitations oData Endpoint CRM 2011

I was very excited in the upcoming REST-Endpoint, especially for further silverlight applications. But the following Limitations, found in the SDK, are a kind of a showstopper.

Only Create, Retrieve, Update and Delete actions can be performed on entity records.

• Messages that require the Execute method cannot be performed.
  
• Associate and Disassociate actions are performed as updates.
  

Authentication is only possible within the application

Use of the REST endpoint is effectively limited to JScript libraries or Silverlight Web Resources.

The OData protocol is not fully implemented. Some system query options are not available.

See System Query Options for more information. (SDK)

Especially lack of "Excecute" is hard to handle. I hope for an update of the "Update" Functionality.

cheers