http://templates.services.openoffice.org/
You can also upload your own templates:
This Template Repository is a place for the submission of new templates made by you, the community!
You created a nice template? Submit it, get feedback and help others to be more productive!
NB: you need an OOo account to upload files, if you've already an account (to access the Issue Tracker for example), you can use it.
Enjoy!
Let's discover the power of the community regarding creativity!