I have no idea if this is even remotely possible, but today when playing WoW, it occured to me just how useful the XX,YY coordants are.
If you've ever used them, you know how handy they can be... now heres my idea.
I'd like an addon where I can specify a coordinat system corrdinats like 44,27 and have an arrow pop up above my character that guides me to that location I specify, when I get there, it'll pop a 'You've reached your destination!', or something.