Is it too early to compare the 10-18 to the 10-22? I think I might like to have that (to complement my 35 2.0 IS).
It is rather early since we know practically nothing other than the claimed leaked image.
Just saw it pointed out elsewhere it has a plastic mount, if that may alter expectations...
Canon 1D, 300D IR, 450D full spectrum, 600D, 5D2, 7D, 7D2, EF 35/2, 85/1.8, 135/2+SF, 70-300L, 100-400L
EF-S 10-18, 15-85, MP-E 65, Zeiss 50/2 macro, Sigma 50A, 150 macro, 120-300/2.8 OS, Samyang 8mm fisheye