I recently got one after being continually puzzled why anyone would want such a device. Owning an EEE made me ready to get an MBA, I realized that there were not that many power intensive tasks that I really wanted to do on the go with any frequency.
My only complaint so far is the battery life. Like the iphone, towards the end of the day, I start getting worried about whether it will make it through the evening. I figured I would be cursing the 1.6, the 2GB of RAM, and the ipod HDD all the time, but I find all three to be just fine for my current mobile needs. I do not sit around thinking "what a slow and underpowered computer" like I thought I would. The lack of ports is just fine with me too, something I never would have guessed.