I really like the *idea* of rollers...but my guess is if I ever tried 'em, I'd do a lot of falling flat on my face. Seems like balance would be tricky.
The thing about roller blades that I've found is that no arches = pain. Lots and lots of pain. Roller skates, nadda. Ice skates... well, I was too busy falling on my face to notice. I'd guess with your feet you'd probably have the same.