My wish would be they would fix all the basic cell phone features they simply failed at, like voice dialing, as well as those things that seemed like no brainers like cut and paste, ringtones, A2DP, a better email client, real 3rd party app support and flash support in the browser. Add the features for us business freaks like decent email support. Add to this the three hardware things I would appreciate, in order of my importance, 16gb, GPS, 3g.
In reality though I don't think any of the hardware upgrades will occur before Feb. As far as the software list I think apple will be slower with software updates than most of us would assume and they will release several cool new features, but only fix a handful of the current gripes before the new year.
(Dear Steve, please prove me wrong I can't hold out much longer before the urge to buy this phone overcomes me)