I have a phenomenal old plan with Verizon and their reception in my area is far superior to AT&Ts, but I couldn't help but drool over the iPhone. However, after much research and talking to people who have owned both phones, I decided to stick with my carrier and get the Droid.
Boy, am I happy! So far, this phone is amazing. It's extremely user friendly and there are tons of great free apps online. Two of my favorites that have educational uses are Google Skymaps and Trippo Mondo by Cellictica.