When I have some time to spare, I'm definitely going to finish working my way through Real World Haskell. I'm a big fan of LISP, but Haskell is really doing the Right Thing in terms of providing a well-supported standard library that handles tasks that people need to perform on a regular basis. (Taking a cue from Python, IMO.) Also, the fact that it easily compiles to machine code is just awesome; I want to write a TCP/IP stack in Haskell and stress-test it against existing C versions.