Sony should soon be releasing v4.0 firmware for the a700. It will have less "splotchy" high ISO noise reduction, including an off setting. Canon 40D and Nikon D300, eat your hearts out!! There's a new high ISO king in town!
v4.0 also expands auto-bracketing to +/- 2 ev. Don't know what else, possibility of allowing the 58/56 flash units being used on camera as master wireless controller instead of pop-up flash. This would make sense since the upcoming a900 would have to do this since it lacks a pop-up due to the giant prism..