iPhone 3G is a good phone for all-around use.

I use it in the hospital - many good aps for medicine

* skyscape has some good free materials

* epocrates is fantastic (esp the new updated iphone full version - not free though)

* Ob wheel

* Maxwellsesque programs (there are many)

all make this handy for me at work.

i like the GPS feature (although the talk feature added to the 3GS would be helpful), the camera is quite good, nice browser, like the ipod feature

Very multifeatured, lots of fun games available, lots of cool aps - they keep coming up with cooler stuff!

Cons: battery life is not...