As far as wide angles are concerned, I only have an old 28mm and the 35mm Schneider shift lens, of which I already published examples here. This one too has no problem. Otherwise the 21-35 zoom covers all my WA needs. I could try the 35-70/2.8 and 35-70/4, I do not think there is much point in testing longer lenses, they should most probably work; the problem is really with wide angles.
I am presuming that the nature of a wide angle lens designed for an SLR (i.e., retrofocus) makes for a more telecentric lens design. Not being any sort of expert in optics, I don't know if retrofocus by it's nature implies telecentric, or if that is just happenstance.
I have a 20/3.5 Olympus Pen F lens, which of course was designed for an SLR, but does that mean it's a retrofocus design? The Pen F has a relatively short lens flange distance; it is more along the lines of a rangefinder in that regard. Being a half frame, everything is smaller, so maybe it is still retrofocus, just on a smaller scale.
Leica M 27.95mm
Canon screw 28.8
Hexar RF 28.00
Leica screw 28.8
Olympus Pen F 28.95
Contax G1 29
All those cameras are rangefinders except for the Pen.
By comparison, the flange distance for SLRs start at about 40mm and go up:
Konica AR 40.5mm
Canon R/FL/FD 42
Minolta MD 43.72
M42 screw 45.46
Contax/Yashica 45.5
Olympus OM 46
Nikon F 46.5
Leica R 47
I'm curious if the longer flange distance of the Leica R by its nature 'helps' R lenses when used on the G1. Although Carl's test seems to show excellent performance of the Canon 24mm which has a 5mm shorter flange distance, so maybe this has nothing at all to do with flange distance and everything to do with lens design.
Perhaps the ultimate test is to try one of the newly designed Leica optics such as the 21/1.4, which were designed for digital. Although I can't see many people using such a lens on a G1 in the real world.