Thanks to Matt Bauer, RubyForge's ViewVC capabilities are getting better still - he's made some performance tweaks that have made things a bit snappier. As he says, it's still not where we'd like it to be, but it's getting there.
Matt also fixed the problem with rsync not bringing over the latest code from RubyForge. The trick, oddly enough, was to use
--size-only. I'm still not quite sure why --size-only didn't seem to be working right... ah well. Along the same lines, we're now rsyncing over the repos once every 4 hours.