No, the Edge Iphone is the only iphone out in 4gb and 8gb sizes. The 3g phone is the second generation i.e. iphone 2.0. The old one runs on the old edge cell network, and the new 2.0 iphone runs on the much faster 3G network. Case closed.
:alcoholic
But technically the first gen iphones were the original 2/4 gigabyte ones that cost 700 dollars. The second gen iphones is when they just doubled the capacities and lowered the price, but they used the same 1.1 software. The new edge phones DO use Iphone 2.0 software, but they are 2.0 because its the first software revision, but NOT the first iphone revision. They are the 3rd generation of iphone, 2nd revision of software.
1g- 2/4 gb w/ 1.1 iphone software
2g- 8/16 gb w/ 1.4 iphone software(the current)
3g- 8/16 gb EGDE w/ 2.0 iphone software