Common Scheme is an implementation of a common module standard for various Scheme implementations, including a package installer that can fetch its stuff from the net. This comes with a number of initial modules that are distributed via it. Could become something like CPAN for Scheme.
Similar approaches have been made before, but unfortunately only for individual Schemes (e.g. MZScheme has something like that). A Scheme-wide solution could make things a lot easier in the long run - and get Scheme out of the academic corner. The language deserves it.
And the best part: Gambit-C and Chicken are among the supported Schemes
Unfortunately, MZScheme is missing from the list of supported Schemes - it would be pretty cool to develop your programs with DrScheme and then simply run them through Chicken to get them quickly ...