Dinesh Kulkarni recently posted our current thinking on the release roadmap for .NET RIA Services. One thing I love about this product is that we are able to iterate rapidly with the community to get the product right. This means being in “preview” mode for a while so we can ensure we have taken all the feedback, but it greatly raises the likelihood of us ending up with a product that can be widely used. We used a similar model with ASP.NET MVC and MEF, and I think they turned out really well.
So please give us your feedback as you try out drops of .NET RIA Services. As we mention in the post, we are enabling go-live with our next CTP, so that should enable more folks to use it in production (though I know some of you already are!).