I've got to hand it to Mike Davidson. He's putting together one of the most inventive things I've seen in quite some time. I'll be writing an article about it soon. But for now, I'll give you the basics.
You can read Mike's very long explanation at Introducing sIFR: The Healthy Alternative to Browser Text. And the most recent beta (check his site's blog for releases after this date) is version 2.0b2. You can download and play with the files — sans instructions for now — at sIFR 2.0b2: The Mo? Betta Beta.