Nice combination of avatars.
I'll be sure to keep those sites in mind. I was under the impression that the CC license did not allow commercial use under any circumstance but if that's not true it'd of course a very viable option.
For the time being I am mostly worried about artwork. Luckily, the way things stand now, 3 artists already offered their help, 2 of whom haven't posted in this thread yet. Preferably we'l need at least one more artist for tile map artwork and/or sprite design. Of course there are many tile maps available under the CC license but graphics have such a huge impact on the personality of the game that I guess it'd be better to at least try to make our own.