In the year and a bit that I've had my iPhone it's become pretty indispensible for me. I don't need to use an alarm clock anymore, Clock does it for me. I don't need to check my e-mail on a computer anymore, Mail does it for me. Maps acts as a great backup GPS device if my Magellan GPS unit doesn't cut it (or if I forgot it at home) :) Alongside the standard iPhone apps I've been trying out a bunch of apps from the Apps Store. I'm a "if I don't get it in 5 or 10 minutes I'm getting rid of it" type of app user. So if something passes muster, and has stayed on the iPhone for a couple of months, it gets my stamp of approval.