Splice is an application that allows you to load and mix sounds into songs using its online sequencer.

I’ve registered on the site and I’m planning to get started on some online projects asap.

Note: (29/05/09) Maybe it’s just me, but I can’t get onto this site at all and haven’t been able to pretty much since I first blogged about it- link is broken, page doesn’t load or something.  Good luck.