I've hacked a theme to be as light and fast loading as I could make it:
The theme is based on "Thirteen" by Becca Wei, but heavily cut back. It's very site-specific at the moment (using our logo, in particular) but when I get a chance to fix that, I'd like to submit it to the WordPress gallery. I'd need to know whether I need to attribute the theme it's based on (it's changed a heck of a lot, and I assume the creator of that theme got a lot of code from elsewhere).
All advice appreciated - thanks!