Hello, inspired by one user of the list, I have made a "Create Textmate document here" automator script, it can be installed in the contextual menu of the finder. When launched it asks for a filename and then creates a file in the place you called the script. It is actually done by opening it with mate.
It's very simple.
You can download the plugin here:
http://www.kualosw.com/dario/tmhere.zip
Hope it helps someone.