Tried it briefly, but Dropbox won't even install on it. In addition, Evernote doesn't work (it seems to be relying on a private API that doesn't exist anymore) and NewsRack sync with Google Reader is completely hosed due to a memory leak that I'm assuming is a problem on 10.7 (but not 10.6 for some reason). Needless to say, I'm going back to Snow Leopard for now, since Dropbox is a vital tool for me.