This release - March CTP - is much different than the others, it came up with new features - like gadgest and other stuff- it also came with new documentations and resources + the new website interface : ) http://atlas.asp.net
Actually, I did not have the time to explore the new bits, but I'm going to do this soon. I liked to share these usefull links with you guys :
If you have more links guys, let me know about them, add them as comments.
Thanks,
A.