I remember seeing this on Gamespot TV (then Extended Play) (now X-Play) on TechTV. It looked pretty interesting, aside from the... umm... stick figures.
Now, lets just say that I am a cello player. I once was, so lets pretend that I still am. I have rhythm, I have rhyme. Put me in a video game, and I crap all over myself. For some reason, me and rhythm games just do not mix. I was okay at that Super Guitarroo man, but DDR? I'm on my face. Any of the other Console based, hand held controller games? I have finger barf everywhere.
So why Vibribbon? At first glance, I would have thought it was from Sega, where the emphasis is on making good quality games that are actually fun to play. Nay, it was but Sony who licensed it! That was a shock
Anyway, through my blabbering, the game probably is awesome, but I haven't played it.