I am always looking for new "toys", but I probably will not buy the iPhone 5. Right now I have an iPhone 4 with Verizon, and I am grandfathered in to an unlimited data plan.
For me to switch to the iPhone 5:
1) It will need to be available through Verizon (I haven't bothered to check on that).
2) I would have to be able to retain my present, sweet, unlimited data plan.
3) I would have to WANT the iPhone 5.
Right now, I am skeptical because of its larger size, which would make it more awkward to carry around; the iPhone 4 is nicely portable. If I wanted a larger screen, I have my iPad and would use that. I have absolutely no use whatsoever for the increased speed of the iPhone 5.
I dunno. Maybe I'll warm up to it after a while.