Another influx of visitors searching for the answer to this question. I think this is probably coming from listing the referring keywords right on the page, and then Google indexing those. Anyway, to answer the question, apparently not, at least not via official RPMs:
GNOME 3 won’t be available as a update to Fedora 14. You can try the Fedora 15 Beta that is about to be released in a few days.
Perhaps not you wanted but you can try the Live CD at