If you are really looking for feedback and not just viral marketing, I think you should have an option to disable the fullscreen blur effects on the boost, if you haven't already, as it makes it difficult to see what's coming up. Instead of the blur, how about moving the camera up close (like in F-Zero GX?)
After a boost, instead of instantly dropping to the default running speed, the character should gradually decelerate to make it seem like he's going faster and maintaining some of that boost. Instantly dropping speed impedes the illusion of speed.
There are some parts in that video where I thought the camera was at too low an angle to see what was coming up through the character, so if there are no camera controls you might want to look for an alternate solution.
Some more petty criticisms: The animation looks kind of spazzy, his arms are a bit too far out from his body and he doesn't bring his hands far enough forward and backward.
If you want to make it REALLY user friendly and "streamlined" you could consider making the front of every surface (that is, the part you are going to crash into if you don't jump/slide/sidestep) a different color from the floor and sides, maybe even make the color go from green at a distance and gradually shift to red up close as an indicator of distance.
If 3D is something you know how to do, I think that would work great for this game. I can't comment on it without actually playing it, and for that I'll have to wait for a PSN/PC port, so get crackin'.