These look a lot better than when Google first came out with the font API. The selection is pretty good now, and seems like a great free alternative to Typekit.
Typekit got in contact: they don't use the Paul Irish 'bulletproof' syntax that has the bug (see http://stackoverflow.com/questions/3200069/css-fonts-on-andr...). They serve separate stylesheets to separate browsers - sorry, I have my font services confused!