This is true. Think of it as the Canon version of the DA mount. The major difference is that with the DA mount, you can use it on a film body, provided you don't mind a cropped negative. I believe the 16-45 will actually cover the 35mm neg from around 24mm and longer.
Indeed, except Canon already have non-full frame DSLRs (10D, D60, D30 etc) that their new mount will _not_ work on.
Of course, one could say they'll work on as many previous Canon DSLRs before the 300D, as DA lenses will on Pentax DSLRs before the *istD....
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