This is the currently recommended version for the normal user.
Gluon Alpha 2, codename "Electron" (version 0.71.0)
gluon-0.71.0.tar.gz

gluon-0.71.0.tar.bz2

If you wish to follow the bleeding edge of Gluon, this is what you want to get. The code in git is not guaranteed to work at any one point in time as new features are added, but we do try to keep it compiling.
If you wish to get the source code from git so you can follow it more easily, the following command will clone the repository:
git clone git://anongit.kde.org/gluon