The Scheme community website at http://schemers.org contains additional resources for learning and programming, job and event postings, and Scheme user group information.
A bibliography of Scheme-related research at http://library.readscheme.org links to technical papers and theses related to the Scheme language, including both classic papers and recent research.
On-line Scheme discussions are held using IRC on the #scheme channel at irc.freenode.net and on the Usenet discussion group comp.lang.scheme.