Since the introduction of Leopard, the getbundle automate script does not work anymore.

Here is the "normal" manual way to do that on your mac, to add Django bundle:

mkdir -p /Library/Application\ Support/TextMate/Bundles
cd /Library/Application\ Support/TextMate/Bundles
svn co "http://macromates.com/svn/Bundles/trunk/Bundles/Python Django Templates.tmbundle"
svn co "http://macromates.com/svn/Bundles/trunk/Bundles/Python Django.tmbundle"
...

Click Here to browse all the available bundles.

Restart Textmate and that's it.