I think people's usage is only going to increase, especially with iOS4.
A couple of Netflix movies or a few days with Pandora running in the background would start eating up that bandwidth.
I have an original (ie. Edge only) iPhone and I'm using 100-150MB/month, even though I'm on WiFi both at home and at work, so I am out of WiFi range only for a couple of hours a week day and a large part of the weekend (even then, a lot of the place we go, like the kids' gymnastics, has free WiFi).
I can see this increasing with 3G and some of those new apps out there. So I'm keeping unlimited, at least for a while.
A couple of Netflix movies or a few days with Pandora running in the background would start eating up that bandwidth.
I have an original (ie. Edge only) iPhone and I'm using 100-150MB/month, even though I'm on WiFi both at home and at work, so I am out of WiFi range only for a couple of hours a week day and a large part of the weekend (even then, a lot of the place we go, like the kids' gymnastics, has free WiFi).
I can see this increasing with 3G and some of those new apps out there. So I'm keeping unlimited, at least for a while.