When I first saw what ADO.NET Data Services was, I wasn’t impressed. It looked like scaffolding + REST URLs and nothing all that special. A nice tool in the belt but nothing mind blowing.
After watching Mike Taulty’s screencasts I’m a little more impressed. The implementation is pretty complete. Not only is the server side complete but the ASP.NET AJAX library for calling these services from JavaScript looks complete and usable AND the webdatagen.exe tool for creating proxy classes to access the services from .NET code is complete.
If you previously dismissed it, give it another look. It is pretty cool. Just one thing… security?