I discovered this recently via a Guitar Player interview (can't remember the guy's name unfortunately). It's been quite a revelation, as it has the same sort of logic as DADGAD, which makes it really easy to learn if you're familiar with that tuning, but has a much brighter, harp-like sound, and the higher string tension makes it awesome for slide playing.
[DR awaits the inevitable smart-ass remark from OzzyC... ]
[DR awaits the inevitable smart-ass remark from OzzyC... ]