haml (easily transformed to css) snippet to format abbrs in a proper manner - you can still type them in ALL CAPS, but they will be displayed in Titlecase and small-caps. If you're using this, you're probably also using a custom face via @font-face, so you might want to explicitly declare the small-caps and lowercase variants of the typeface - the browser often fucks up auto-small-caps.

also, not tested in internet explorer. nothing I write is.

   1  
   2  abbr
   3    :display inline-block
   4    :text-transform lowercase
   5    :font-variant small-caps
   6    
   7    &:first-letter
   8      :text-transform uppercase