While I understand why wide lenses need to be designed for it, how about an adapter that would allow for T/S on any EF lens? Hasselblad has a slick setup in their HTS 1.5 setup, and while it's no technical camera, the ability to use different lenses is nice. Toss in the electrical connections for focus and such, and you could get some really interesting stuff.
Too bad Hasselblad hasn't figured out how to sell their products and actually have example photos and such...
I don't think the image circle on standard EF lenses is big enough (or bright enough) to do this kind of thing. I guess the Hassy lenses are already overdesigned with huge image circles. Perhaps it could work to a limited extent with EF lenses on a crop body, but most crop users wouldn't be interested, I suppose.
EOS-M tilt adapter? I like it!
Just one more reason those cameras are a good idea.