[Haskell-beginners] Getting into a Haskell project?

Hi All, I'm very new to both Haskell, and open source development (well... really, development of any kind...). However, I'm really interested in getting good at both. I was wondering whether anyone has any suggestions about good open source Haskell projects I could cut my teeth on, and any advice in general in getting into this stuff more deeply? Thanks! Duncan