Hello, haskellers, I am a total newbie in haskell, but I've been making some mud pies that are coming out kinda pleasingly to my admittedly biased eye. I found Jonathan Tang's excellent tutorial "Write yourself a scheme in 48 hours" a few weeks ago, went through and beyond that, and now have something that's starting to look moderately like a real scheme interpreter. I've got much, though not all, of the scheme number tower implemented, I have most of the core syntactic forms (and, apply, begin, case cond, define, if, lambda, let, let*, letrec, letrec*, or, quote, set!) and am working on a few more (delay and force are well along, guard is also in progress but less so), and I have implemented a small trace facility. It's still a toy, but it's starting to be a toy with some nice dance moves. I think it could do the majority of the code in SICP by now. If you'd like to have a look, please surf over to http://www.korgwal.com/software/haskeem/index.html. Feedback welcome! best regards, Uwe Hollerbach