Everyone knows me, and can probably guess how much I'd use a smart phone. I have an older Android, by the way, and love it. Last month I hit 345 MB, and I do believe that was a new record.
So that should help you plan accordingly.
Since I've gotten my HTC Incredible (Android) in May, I've used well over 1GB each month. I watch a YouTube clip here or there, but maybe average 1 a week, I get my personal email on it and not my business stuff. I do use some news/weather apps, and a few other "web enabled" apps, and it seems to just pile up and I would say that I am far from a "die hard" phone user.
