I saw another Mobile thread, and felt the discussion was not really going anywhere, but do feel as someone who would use it, it is a great discussion. A mobile app, with my experience as a developer, is the wrong way to go right now, just due to how many devices there are out there, let alone just the resolutions you would have to support for blackberries and droids...
I think, though, there should be a mobile site developed that would allow for easier browsing of threads and such. Site admins, you can check out something like this:
Mobile/Cell Phone Style - vBulletin.org Forum
At least support easier browsing on mobile devices. If someone wants to have a pet mobile project, so be it, but honestly, with how many phones support web browsing, vs, device compatibility, it really isn't worth going that route.