The Modern Pro Tour finalist use Deathrite Shaman in a deck with Goyfs. FYI
He's going to be good in Legacy and Modern. I dunno about Vintage. He'd have to offer more than Noble Hierarch. Does he?
Yep. Like I said a few posts ago, you only have four real viable creature accelerators in the format: Spirit Guides, Heirarch, and now Shaman. Compare Heirarch to Shaman:
1) Heirarch : Hits on turn 1, but it sick; Adds U/W/G to your pool; adds +1/+1 in combat each turn immediately; can tap for mana and add damage same turn.
2) Shaman: Hits on turn 1, but is sick; Adds any color to your pool; hits opponent for 2 each turn when not sick; cannot add mana and damage opp same turn; vulnerable to graveyard hate.
Depending on the colors of your deck, they both add the same mana to your pool. Shaman, however, hits harder when he's helping with the aggro game, but has to make a choice about whether he's aggroing or ramping. I come down on the side of saying anything Heirarch can do, Shaman does better, with the sole exception of pumping Cold-Eyed Selike. Once my newborn lets me make decks and play again, I am planning to remove Heirarch from all decks I had her in that do not play Selkie.