Twitter gives you a chance to try a lot of new stuff. A few days ago I saw DigitalMaverick ( Drew Buddie)Tweet a link and using that link you can turn text upside down .
ƃuıʇıɹʍ ɹnoʎ dılɟ oʇ ʎɐʍ looɔ ɐ sı sıɥʇ = this is a cool way to flip your writing.
The Website is http://www.revfad.com/flip.html. You just enter the text in one box and it automatically flips the text. Pretty cool . I have not found a real good reason to use it.
May be its useful for printing signs on the back of your car for those following you to read?
Anyway a lot of cool things on the Internet may not have a apparent utility value but who knows.