Welcome aboard, CadmiumYellow!
The smaller sensor size also makes it harder to get a true wide/superwide angle; I’m not sure if there are any lenses for the 4/3 system wider than 14mm, which ends up 28mm with the crop factor. That’s not all that wide, though that might not matter much to you, depending on your subjects and shooting style.
Olympus now has an 11-22mm as well as a 7-14mm:
http://www.olympusamerica.com/e1/sys_lens_714mm.asp
http://www.olympusamerica.com/e1/sys_lens_ez1122mm.asp
In general, though, there are fewer choices for the 4/3 mount (and a much smaller selection of available 3rd party lenses) than for Canon/Nikon.
It seems to me that the relative advantage between Canon and Nikon in terms of the body specs swings back and forth based on their different release cycles, and it probably makes more sense to look at the lens availability and what you want (and might have some reasonable expectation of actually buying) in terms of glass rather than getting too hung up on the specs of the different bodies.
