I don’t know if you’ve come across Aviary yet but they have a range of web based applications that are just great.
I realise that there are a lot of web2 apps out there now but I find Aviary to be really quick and intuitive – and best of all stable.
The new addition is a music sequencer – a really simple and effective ‘Garage Band’ equivalent. Like all web2 apps it takes a little wile to load first time but but restarting the app once you’ve downloaded it is quick and easy.
I loved it.