I have read it before (and wanted to joke saying to ck that she mentioned it twice.)

I don't usually post unless I have something of substance to say, but anyway...

-The filesize shouldn't be too big for it might deter people on dial up. As for compatibilities, you have to see what OS s frequent the forums the most and take that into consideration.
-You could make a contest out of it, the prize being the signature (or Premium for a couple of months for regular members.)
-Some people could come up with ideas, but not with the programing. (In my case, it takes me too long to program the simplest page and time is something I lack.)
-Just a porthole or a news page also as it was talked about several times?
-I think your best bet is laying out a unified skeleton and giving free reign to creativity.