Saw this on BBC Click this morning before work. Basically it's a little beat box site that allows you to combine several beats, chorus', voices, etc to form a tune. It gets a bit repetitive after a while as you only have a small selection of beat box sequences to pick from, but it's a good time-waster.
Www.incredibox.comIt's very easy to use - simply drag your sound icon onto the last beat boxer in the line (he's topless if he has no tune assigned).
If they added more sound sets to this, it could become quite good
Tip: You can mute or solo any "player" by clicking or long clicking them - double click to remove them, rather than using the mouse-over command box.