For added fun over the weekend, I spun a new f10/kde42-based live image, based only on official fedora bits, available at the usual place:
One item that still needs packaging work is soprano's sesame2 backend. Slow and painful, that is, rebuilding it from from source. Good news: We have a couple of contributors actively working on it. Bad news: They estimate it'll take another ~2 weeks of java packaging love to make it happen.
With the recent call to arms for testing qt-4.5 and kde-4.2.x, we're taking the plunge for fedora, see my post: "qt-4.5(rc), rawhide, and you":