The original suggestion wasn't a theme, it was a third party service that accesses our database.
While it's a lot of pinching and zooming, the iPhone does have the best phone web browser out there. Like... without a doubt, so I don't see any reason why it's really necessary to do this. If you're into that sort of thing, MobileSafari can store passwords, as I recall, and/or you can make a 68kMLA home page shortcut.
The forum reading software that was linked to, so far, only one person has said that they use it. If we were to do theming at all, I'd prefer a no-images, simple table theme that might work with, say, netscape or IE3 on a 68k Mac, or work really well with a phone browser, or work well with a text-based web browser like links or lynx.