SiteMeter's service was atrocious enough to use before (it was slow, and barely worked via BlackBerry), but now they've gone and redesigned everything—and I don't know how they did it, but it's even more horrible than before.
Augh. Looks like I'll be spending more time in the equally-mobile-unfriendly Google Analytics.
Update: SiteMeter has reverted back to their old software. I'm definitely thanking my lucky BlackBerry!