I know some BASIC stuff about it (stopped caring about other WoD lines about the time it came out.. Mage, Vampire, or Werewolf.. the others can bite it..)
But.. Hunters are imbued by the messengers (Angels) to "inherit the earth" from all the nasties that prance through the dark (while writing gothic poetry that laments their undead lives....)
Anyhow, they're pretty weak, and often go insane, but they're good guys... I think.... I know their powers are based off "charms," which are similar to WW's other new line, Exalted, as well as the Gifts from Werewolf (I THINK...)
Oh yea, if you like Final Fantasy, Hong Kong blood operas, or just fantasy anime, check out Exalted. It's quite a bit of fun, being crazy epic and all. I've been running a game for about three years now that's quite successful...
I'm proud to say I've turned to frat boys to it...