I'm also absolutely positive that I would -never- use it. An A+ upgrade would mean for me: higher res screen (like in the rumor), a more crack resistant back like the iPod Touch, speed speed speed, better reception and more battery life.
On the software front I would like some minor multitasking so I could run two third party apps at the same time, that's enough. Faster switching between apps, more versatile springboard with more info on the start screen, and that's basically it..
No crazy things actually now I come to think of it.. Steve: do this and you sold me another one.