CSS Selection Styles?

Did you know you could customize the selection colours of html pages with CSS?  I didn't - until now.  Turns out, there's a CSS3 pseudo-element called ::selection.  Naturally, this isn't yet a technique supported by browsers like Internet Explorer, but it is supported in [albeit with different syntax] by Firefox and Safari.  Interesting, eh?  Check an article on CSS Selection Styles from Quirksmode, and have a look at some of the creative effects you can get with it here.