As I suspected, back at the time of this post, Apple has licensed ActiveSync, and it will be available on the iPhone when the 2.0 software update becomes available, which should be some time in June.
Also, since that last post, I've gotten quite a bit of time to actually use an iPhone and I have to say that I really like it, but as I see it, there are two things wrong with the phone as it exists right now. First is the lack of ActiveSync, which won't be an issue in about three months. The second is that you can only attach it to AT&T's crappy EDGE network. Granted, they did try to beef it up in the run up to the iPhone release, but at best you're still probably only going to get about 80k down, which is pretty slow when compared to 3G networks. When iPhone 2.0 comes out with HSDPA and ActiveSync, I will seriously consider purchasing one.