Sorry I am not getting myself back to law commentary, but I did want to report on my use of the iPhone on two trips out of town. I went for a week to Chicago & Indiana for a legal convention [I became Chair of the Employment Rights Section of the American Association for Justice there] and then to shoot photos on the return trip in July and then in early August went to New York City to visit our daughter. On both trips I took my iPhone, of course, and my MacBookPro so I could do some work as well.
In both instances I found that I carried the iPhone with me and used it everywhere and left the MBP back in the room and used it only occasionally at night. With the exception of some 'dead' areas in the convention hotel [where the MBP wouldn't get wireless either] where neither wi-fi or Edge network worked, the iPhone did a great job of keeping me up to date and providing all I needed. If I couldn't get a signal, I just went upstairs and got the Edge network [or found free wi-fi to use] and did just fine. The Edge network is slow, but I usually do other things [multi-tasking] while waiting for my computer or whatever to finish what it's doing so I just let it download while I read a magazine or something. In New York I could find free wi-fi easier and did so.
If I was sitting somewhere and was fairly bored by what was going on, I could just turn on the iPhone and grab my mail via either Wi-Fi or Edge and read it, or just plan to read it later.
My main quandry, which I haven't taken the time to research and resolve, is that you download all this mail to your iPhone and I'd like to trash it now but am not sure how. With the .Mac email account it's easy, to either sync or overwrite; but I also have a Google GMail account for picking up mail via my iPhone and I'm not sure how to clean it off. Yet.