Good news and bad news.
The good news is, we are real close to putting a strong beta build of SP1 out on the beta forums.
The bad news is, it just isnt going to be this week.
We have had 2 team members sick for the last couple days and we need their changes checked in to have what we want the beta testers to exercise with their tests. SDK setup has some issues on uninstall that make the beta less clean than we would like. And there are a few less important odds-ends we'd like to clean up. So we need a few more days.
We will alert people when, hopefully next week, we have the bits ready to post.
I know some will be disappointed, but its better to have a single strong beta drop than having to drop bits multiple times. So stay tuned.