There's got to be some simple way I'm missing, but for the life of me I can't find it. How do I check my version of GNOME-Shell?
The gnome-shell man page doesn't show --version as an option. Assuming you have installed it from the ubuntu repositories then you can look up the version in the repository. To just show the version:
apt-cache show gnome-shell | grep Version
On Ubuntu Maverick (10.10) I get
Note that this works whether or not the package is installed. You can also look up all packaged versions of gnome-shell on all ubuntu versions on http://packages.ubuntu.com/