I think Iphone 2G is not Bluetooth enabled. We cant pair any other cell or P.C with Iphone 2G but in 3G we can avail a lot of such kind of benefits.So, I think it does matter. So thats also a big difference beside the 3G technology
You cannot send files via bluetooth with the iphone, be it a 2G or 3G.
The reason for this is quite obvious and it really annoys me.