Cameo Extravaganza! From left to right:

Waya, from CD Rudd’s upcoming webcomic Wolfpac.
Jiggawatt, from Grrl Power.
Lust, from Sins.
Ginger, from Collar6.
Dina (catgirl form) from Gender Bender DNA Twister Extreme.
Zeetha (Warrior Princess!), from Girl Genius.

And here is a high-res version of the Cameo Extravaganza!