[Haskell-cafe] Design in Haskell?

Hi, When I was learning to program in imperative languages like Java, there were plenty of resources to learn from about how to design large programs. Ideas like the GoF Design Patterns gave useful models that one could then scale up. Are there such resources for Haskell? As I'm learning the language, I'm finding it quite nice to write short programs (e.g. projecteuler, Haskell Road, etc.) But when I try to write something a bit larger, I find I'm tripping over myself and having a hard time organizing the code coherently. Are there any suggestions of wikis, books or particularly well-architected and readable projects I could look at to about learn larger-scale design in Haskell? Cheers, - Dan