I don't know much about the game - perhaps the Oldhammer Weekend down at Foundry might change that if a demo game is run and I get enough time away from running Orc's Drift and playing all the other games I want to!
Of particular interest to me from an Amazonian point of view are the Lion Tribe Female warriors from the Thousand Tribes faction - definitely good Koka Kalim material.
There are also some rather nice Cavalry options from the Thousand Tribes who'd make very nice Chaos Thug Horsemen and women.
Back to the Amazons though, and the Half Elves are another faction with some promising options. They have quite a Native American feel to them but I'm sure with the right paint job I could Meso-American them up a bit.
With a little bit of Otoplasty, these ladies could make some good Tribeswomen to bolster the ranks. I wonder if it'll be possible to cherry pick the females out of the Vulture tribe packs?
More to add to the shopping list for the Oldhammer weekend!