This has to be one of the coolest sites I’ve ever seen. Granted its a Java application but still to emulate all the stop boxes and sequencers is truly amazing. To see what I mean, you’re just going to have to try it.
http://www.hobnox.com/index.1056.en.html
The setup is very much like that of Reason or Fruity Loops buts its online.
read also createdigitalmusic.com

Hey Jesse -
Thanks for picking up the Audiotool! We’re all really excited about the progress of our beta and are currently working on additional functionality (including an option to save your compositions).
Thought this might intrest you as well, it’s one of our devs playing around with the Audiotool with a Midi keyboard:
http://ohryan.tumblr.com/post/31358380
Cheers,
Ryan/Hobnox
Java is used for the audio output only as workaround. With the next Flash Player release there is probably no Java required anymore to run the Hobnox Audiotool.