Where to start, eh? Butterflyfish's store is full of them, but try Dante for a darker look. Motif has several fantastic sets as well. Luciferano/Malefic have some nice ones, too. Try ArtCollaborators at their own site (it's late, and I'm too exhausted to chase down links;sorry). A_ has Shane -- a wonderful set for freckles. If you like hairy, try Jepe.

These are just some of my favorite vendors.

-- Jeff