So far ... Kai "the spy" Winged Victory Praetor_Shinzon auntiehill Starkers od0_ital Zion Ravescene cardinal biggles Showdown the G-man Nerys Myk Orac Last call for entries, poll goes up tomorrow.
You said tributes and references, so does this count? It's Tim Daly (the voice of Superman) with Nathan Fillion (the voice of Green Lantern).
I really want to, I love that video (to bad there's no group pic with Rosenbaum in the mix). The thing is, if I do, I'd basically say YouTube-Videos are a fair source, too. What the heck, I'll allow it, because it was semi-professional. That, and there's not much time for any other YouTube-based entries left, anyway.