Haskell Development

Hey /prog/, tell me things about Haskell.

How is Haskell's support for the type of interactive development that I, as a Lisper, demand? Sometimes I look at Haskell for a while but it has all kinds of syntax and I've gotten the impression that developing in Haskell requires a step backwards to batch compilation, so I give it a rest pretty quickly.

Could some nomads either confirm or disabuse me of my notions?

I don't necessarily want to save that image to disk, although this can be useful. I'm happy enough using files to hold my code.

I do want to be able to load new code into my program as it runs, replace functions at any time, and load single functions from source files as I change them (this being more an editor feature). All this operating on my program in "finished form", so to speak, meaning compiled code (including code I load at run-time) and behavior otherwise identical to what I'd get from a production build.