The new iPhone 4G release date is in June 2010, and the picture above is an iPhone 4G. iPhone 4G means iPhone fourth generation, not 4G network. Gizmodo, a tech news site took this photo of the iPhone 4G before returning the prototype back to Apple. A Verizon iPhone is possible, but it is more likely that it will launch in 2011.
A Sprint iPhone seems to be more likely to launch this year because Sprint already has their 4G network ready, and they plan to launch their first 4G phone, which is the HTC Evo 4G in June. If either Verizon or Sprint get iPhone, I'm switching right away. What about you?