http://stackoverflow.com/questions/1775954/using-python-3-1-with-textmate

Variable can be set in TextMate either on a global or on a per project basis. It seems some of the internals are coded using Python 2.x, therefore a global switch to the backwards-incompatible 3.x is not recommended.

Project based variable can be set by opening a project, deselecting any text files, and clicking on the little i-icon in the project window. My path for Python 3.1 is: TM_PYTHON /Library/Frameworks/Python.framework/ Versions/3.1/bin/python3 Your milage might vary.

Instruction from the TextMate site, this is the minimal info for installing TextMate Bundles

mkdir -p /Library/Application\ Support/TextMate/Bundles cd /Library/Application\ Support/TextMate/Bundles svn co http://svn.textmate.org/trunk/Bundles/Haskell.tmbundle

Update all bundles cd /Library/Application\ Support/TextMate/Bundles svn up *.tmbundle