Rewriting the 2xl simulator is definitely needed since browsers are all dropping support for flash. The alternative would be to rewrite it for mobile platform (java for android).. but if it can be done with html5, that's the way to go.
If we can find someone with some experience with handling audio files in html5 that would be great.. If I have to I can learn it myself, but if there's someone else ready to tackle the project even better!