It's also worth calling attention to Lisp flavored Erlang (LFE), which has come a long way recently. They've specifically addressed language artifacts that would be more welcoming to someone coming from a strong Common Lisp background.

For seeing where it's heading, read Duncan's website: http://technicae.cogitat.io/search/label/lfe He gave an excellent presentation on this at Erlang Factory conference in San Francisco last month.

Otherwise, the main website is: http://lfe.github.io