My backlog makes me late on a lot of announcements, but I’d like to post a link to the new MDX Studio by Mosha Pasumansky, because this is a very useful tool when you need to dig into an MDX query issue.
There is a forum dedicated to the tool on SSAS Info website.
The SkyDrive directory where you can find CTP releases is this: http://cid-74f04d1ea28ece4e.skydrive.live.com/browse.aspx/MDXStudio
It’s not a beta, it’s an alpha and there is space for a lot of improvements – I’m going to try it to give my feedback too.