I think this is a very interesting article on what we should expect to see out of the iPhone. I think it's a lot more realistic than some of the stuff I see thrown around here. It doesn't cover much but I really like the logic behind it on what he does expect to see and time line and I think it is definitely something to keep in mind when trying to predict what Apple will put in the iphone (his basic premisis is that Apple lets others do the testing on new technologies and tends to only put them in when demand starts getting higher. If you think about it, this pretty much fits Apple to a T, especially with their focus on wanting to aim their products on what the mass market in general wants).
http://trap.it/thnBwr
http://trap.it/thnBwr