I think a new thread should be started, and people should lay out their submissions based on the two requirements in Bingo's post above: a logo and a smaller icon. Multiple entries from any individual can be posted. Bingo can then narrow down his top choices for voting. Or hell, it's his site, he could just choose from there.
You could have people submit under two columns:
- Main / forum website logo
- Icon / letterhead version
The above don't necessarily have to be different, either.
Bingo will also have the right to modify the preferred logos according to his preference; ie. if there's a color scheme he wants, or if there's a small design change that he think he would like to see.