Yep, a download-center where you can upload and let other users download files would be awesome. Almost like the Gallery, but with downloads instead. It could look very similar.
And maybe like UBB.Gallery but you can view videos and download them of course?
UBB.Downloads and UBB.Videos. So you can have "Latest Videos" and "Latest Downloads" in the portal, and maybe you can even download the file or preview the video directly without going to the file. You should probably be able to mix all these 3. So lets say you have uploaded something in UBB.Downloads, but you would also like to add photos and a video tutorial, well, that should be an option if you want.
It's important to not make everything messy, and I think Rick have so far managed to integrate the Gallery and Threads, very smoothly and clean, so I think it is very possible with Downloads, Videos and other types of files/media.
The best thing with UBB is that these kind of stuff is integrated and optional and is free, with Invision Power Board (IP.Gallery is $65 ($30 for 1 year of upgrades and tech support) and IP.Blog is $50 ($20 for 1 year of upgrades and tech support) and IP.Downloads is $50 ($25 for 1 year of upgrades and tech support) but you can buy a community suite for a small discount and the updates are discounted also, but you still have to pay for updates to these modules. And vBulletin for the blog module $50 ($20 for 1 year of updates) and project tools $50 ($20 for 1 year of updates) you have to pay quite much for these features. It is awesome that these kind of stuff is included for free with UBB, very nice!
So UBB has a big advantage, so lets keep it!
