Yes! After so many requests, Glimmer's Eclipse SVN Repository is finally cloned at GitHub (thanks to Soleone's suggestion to use git-svn):
Here is the main GitHub project page:
This will make it much easier for people to contribute to Glimmer. Instead of checking out the SVN repository and submitting patches back to me to merge. Developers can now fork Glimmer completely on GitHub, commit multiple changes, and then notify me to merge the forked version back into the origin/trunk.