Well, the SIMS, FMS and Discover Spring BETA is now available. I'm sure that previously for the Discover betas, links were posted on SupportNet. Now it appears you have to e-m,ail UAT for access.
Getting my test VM's upgraded today. Hopefully all goes smoothly. :)
I guess this also means that the full release will be 3-5 weeks away(?) and we'll be able to start looking at the SQL 2012 migration tools! :)