I'll see if I can whip some more up, but feel free to submit your own creations.
Vitamin Water Style
http://i.imgur.com/PoKRdoB.png
Playtester logo:
http://i908.photobuc...an7/SotPSig.png
50s/Bioshock Inspired:
http://i.imgur.com/k1idK.png
http://i.imgur.com/T9TBp.png