actually, that thing looks pretty cool! The problem is having something to display it on/interface with it and be able to look at safely while driving. They have a "guage format" (at least, I think I read that) but as I have no laptop, PDA or LCD screen to hook it to, I'm outta luck for now. You're right that it would give loads more info than a scattering of guages.
Looks like it's almost a must-have for modern day shade-tree machanics too.
Greg