You might like GLTerminal (google around for other builds).
If it doesn't display, go into Session->Preferences and pick the Classic Terminal plugin under the Renderer tab. You may want to slide the curvature down to get rid of the gimmickiness.
[ edit: Also, iTerm can do full screen, currently you kind of need to play with the font settings to get something close to 80x24. View->Font Size Follows Window will probably be what you want. ]