Hi Lilly, I think this is a great idea.Why not have a sub-forum for all these softwares sub-forum? Then, there could be a description at the bottom, it can say (Zetaboards, Forumotion, Proboards, etc). Give these admins a place to go also to discuss their softwares instead of the general software board to make it more welcoming.
Invivision free sold us our Dbase as soon as we asked for it.When I first started off on forum I stared with them but just before zeta was born, I think it was Invision or something and we like that setup. When they cut over to Zeta it was a mess the software sucked (don't know if it is better now). Anyway I can now thank them for this as this made me leave and find my own hosting. We had to start the forum from scratch as they refused to sell us our database as they promised to so that was a bit of an issue. So if you going to use services like this make sure they deliver on what they promise.
Looking back now it was the best move we made and went to SMF and now we on vBulletin