I'm asking this right off the bat because I think this is a very important factor in ASP.NET's webforms success (like it or not). I believe the ASP.NET architecture is pretty solid and maybe it will be able to accommodate such story in a way that we have not seen yet in other platforms.

Hi Sergio! Yes, for the CTP we don't have a story for control vendors. This is one of our highest priorities for the next milestone.