Over at Backreaction, Bee has posted a fairly readable introduction to extra dimensions, including a sort of taxonomy of different models. If you’re interested in that sort of thing, take a look.
It almost makes up for the dreadful visual pun from a little while back.
(There’s other good stuff there, including a list of stupid paper titles, and a review of Peter Woit’s book. There are worse ways to kill time than spending a few minutes poking around that blog.)
Is it actually possible that Buckaroo did go there, and that’s why there was no sequel?