I think you actually can in css 3...
font-smooth: always;
Unfortunately, and rather ironically, css 3 won't be supported by IE until version 9 comes out.
so if css 3 is not supported by the existing IE's that mean that i can't use this buttons http://www.smashingmagazine.com/2009/12/02/pushing-your-buttons-with-practical-css3/