Silverlight 3 with RIA seems to be very powerful. I hadn't programmed for 6 years after working on VB6. I about a months time, here I am developing a web applicaton that uses SL3, WCF and entity framework and I feel very comfortable.
The silverlight forum and stackoverflow ofcourse are very active and for some of the problems that i've had had, I have been able to get a solution easily.
The one thing I'm not sure of yet is performance.
