>Yup. If I have an event driven program can I use another library that is not built on the same event driven framework?

This is why my original post suggested that people need to start demanding better of their languages. This is a total non-issue in haskell because the "event driven framework" (that's really over-stating it, they are just relatively simple libs) is part of the language runtime. So everything uses it. I get concurrency and parallelism with the scalability of an event loop just by doing:

    forkIO myFunction