Hi all, Just a quick announcement that I've just released the first alpha version of Heist, a Scheme interpreter in Ruby. It's currently fairly arithmetic-focused, but it also has runtime support for some of the more tricky stuff like tail recursion, macros and first-class continuations. More info on my blog, and on Github: <a href="http://blog.jcoglan.com/2009/02/25/announcing-heist-a-new-scheme-implementation-written-in-ruby/">http://blog.jcoglan.com/2009/02/25/announcing-heist-a-new-scheme-implementation-written-in-ruby/</a> <a href="http://github.com/jcoglan/heist/">http://github.com/jcoglan/heist/</a> Feedback very much appreciated. I know people are forking it already, and while this is very gratifying I should point out I'm currently not accepting patches as I'm writing this mostly for my own education. Implementation advice and literature will be very gratefully received, however. -- James Coglan