OK well hopefully if your reading this, your not a stranger to photoshop, so heres the challenge..

choose a theme for the opposition to design a graphic, then when complete give the other player a Theme to work on.
Can be done in any style as long as it represents the challenge theme.
Ok so if you still reading here are the dimension:

800x350
jpeg xchange
72hr Time limt

(whoever wants to play, reply with the Theme i have to do and we will go from there)