According to MobileCrunch, the Samsung Infuse 4G features:
- 1.2 GHz Hummingbird processor
- 4.5" SAMOLED Plus (2nd generation SAMOLED display)
- Android 2.2 with TouchWiz UI
- 8MP main camera with 1.3MP fron-facing camera
Both the 1.2GHz Hummingbird processor and the 4.5" SAMOLED Plus display are two features we have yet to see in an official device. No information was available as to the resolution of the 4.5" display. As for the 1.2 GHz processor, I believe that it is likely the same featured inside the Galaxy S, Tab, and Nexus S, but with the clock speed increased 200 MHz.
Engadget has a short video showing off the front and side exterior of the device, but unfortunately, they are keeping the back of the device underwraps for now. This is likely because they are waiting for the official announcement from AT&T to reveal more features.
Image from MobileCrunch