I just checked out this wbaite-it looks great. Thanks for posting it.
I like the tunings feature. It makes coming up with a new feel for your blues very easy. You can reset the display and tune your guitar, then use the display to quickly put together a new arrangement in a tuning you probably have never tried. This can give you a piece with very different emotional qualities. Viva 12bar.de! Reminded me of the sort of dedication practiced by America's incredible teacher Ted Greene.