Create web-based music and video app - with $250 bonus!

I need a web-based app for creating music and videos. I assume Flash would be the best choice but I am open to alternatives. ## Deliverables I need a web-based program that allows the users of my site creating their own songs and videos. They can add (midi) instruments, do modifications and also record their voice (via microphone). They should be able to add videos and/or record their own videos per webcam and integrate them with the music to a music video. Another feature would be to merge a background picture or video with the user's picture/video background video. Please only bid if you have extensive experience with Flash or the other language you think you can accomplish this. Please show me your previous work before you bid. Continuous (separately paid) projects will follow this one when competed. I will also pay in addition a $250 bonus after this project has been completed to satisfaction! Thank you.