- To-do list - more than anything else, I use my phone to keep track of what tasks I want to accomplish each day. The iPhone comes with no to-do application. Boo! (Perhaps OmniFocus for iPhone will solve this one for me)
- Offline scriptures - I regularly read the scriptures where there is no wi-fi connection and no phone connection. With Safari on the iPhone, I might be able to install raw HTML files for the scriptures
- Password tracking - I have too many passwords to keep in my head. I currently use an antiquated Palm application to do the job. Certainly there will be something like this for the iPhone, but I haven't seen it yet
PMTxl - track my checking account. Now that my wife and I use Mvelopes to track our personal finances, I don't use the Palm anymore. (By the way, Mvelopes is the best personal finance program I've ever seen. It perfectly matches my mental model of flowing water budgeting).
It's been intriguing to look over my old PDA Wishlist and compare it to the iPhone. Only the FM transmitter, thermometer, barometer and bar code scanner are still missing. Give the industry a couple more years and some of them will be available.