I really like my iPhone and I bought one for my Mom too. My Mom really isn't all that tech savy and she manages it pretty well. She loves YouTube for some odd reason. She also has become quite the Texter. I really like that our library has started a free audiobook download service, I"ve been using that so much lately.
I've never really looked at the Google phone or the Blackberry Storm to see how they compare. My oldest son has a Blackberry Curve and I think he covets my iPhone.