ok, i am still reading this thread...silently
if this is going to be a big biz RPG, why not do a dungeons and dragons clone? these games would probably be fairly simple to emulate, as their combat systems are simple, and easy to emulate with random variables. A good adventure/role play game could really suit your engine tht you have so far (point and click) and as you havnt really done to much allready, now is probably a good time to start anew.
since your other team members have gone walk about, i can help you if your gonna do an RPG (preferably D&D :) )
i can do:
isometric flash grapics (great for rpg's)
some code
story stuff
well, give it some thought