Skeletal Vampire: might be a replacement for the queen in dragon, for those who dont run caller. Tokens are flying, so provides a little evasion for you.
Tell me again why my infinite number of guys need evasion?
I've also been looking that a few cards in the set (haven't seen the entire set yet, but the fact very little gets mentioned here tells me that I shouldn't get too excited). A few combos have come out so far but none of them are fast enough or good enough to play in Vintage.
Niv-Mizzet with Mind Over Matter is nice... if you didn't need so many colored mana.
Storm Herd is a great card, I think... if you are ever able to cast it.
The list goes on forever...
The only thing I've seen suggested here that I hadn't thought of yet is the Burning Tree Shaman. It seems like a pretty good card but testing with R/G Beatz has shown that three mana is a lot when you are playing this deck. We've cut Crucible of Worlds for exactly that reason (and being too narrow).