I am the Lead Developer on the Web Client Software Factory team here at patterns & practices. After a bit of time working with a number of customers (to ensure we were dealing with relevant problems that people face in the real world), we have started development and publicly announced the project. This week we have released our first weekly community drop to CodePlex.
If you write web clients, you may want to check this out, see where we are headed, and offer input. This is still very early in development, so there is not much functionality yet. However, there is a solid structure and a good skeleton to work from.
You may also want to check out a few other projects that I have mentioned before to get a feel for what will be delivered. Here is the list of all the software factories that p&p is or has worked on: