i think it sounds a little too slow, it's something i'd play in the background as a kind of white noise while doing something else but it's nothing that it'd get up and dance to. the song doesn't have a whole lot of substance. don't get me wrong though, it sounds just fine musically (nothing out of tone, consistent rythym, etc).
i don't know how drumnbass.net works though, i hardly listen to drumnbass music myself, and i don't know what the requirements/norm of music is supposed to sound like. if what i just described is what you're going for, you've hit the nail on the head.
DO IT[/s]
i am questioning how you got the beginning and end of two different bbc formats, s and i aren't anywhere close to each other on the keyboard