FYI with Typekit you'll need to use 'mo bulletproof' instead of the default supplied demo CSS, otherwise your fonts won't show on Android (due to an Android bug).
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!