Thanks for pointing out ConTeXt, I might try it out for my next presentation. The examples in the wiki seem to provide all that I need in a much more concise way that the LaTeX-Beamer package.
It's very powerful. Syntax isn't as nice as LaTeX (although it is much more consistent, since context is mostly developed by a single team instead of being a mass of extension), but you really have much more control (LaTeX floats are the devil incarnate).
