Yeah Joe pretty awesome ! If you're interested the Beta is out (thought that there is not that much instruments available for now but more to come ! At least 20+ new per day until I release the Final Version)
CardSharp: your song is awesome :) but to anyone that want to load it do not forget to put "http://" before the "www" or flash will not be able to load it.
OldBoy : You can change the tempo, just look carefully in the middle right