For all those Python coders - IronPython is usable in production now. It's stable and the differences between cpython and ironpython are well documented.
Common Larceny uses the pkcfm hack for its continuations, I believe, while Bigloo continuations are more like IronScheme's ("Bigloo discourages the use of call/cc" - from the manual).
Disclaimer: I have personal experience with neither system.
http://en.wikipedia.org/wiki/.NET_languages
For all those Python coders - IronPython is usable in production now. It's stable and the differences between cpython and ironpython are well documented.