Just as an FYI, Scientific Linux is out with their 6.1 release candidate. So any day now. But as to your suggestion about everyone building a common core. I saw that idea passed around on the SL mailing list a couple of weeks ago. Don't remember ClearOS being mentioned, but I do remember Oracle being a part of the discussion. So I think folks are trying to build a community. We'll just have to wait and see what happens I guess.