Download additional strategies and place them in directories here. Remember to name the directory name as the actual name of the strategy. For example, place Facebook strategy files in ./Facebook/ so that FacebookStrategy.php can be found at ./Facebook/FacebookStrategy.php.

If you prefer git clone, you can simply run the following at this dir without worrying about renaming:

git clone git://github.com/opauth/facebook.git Facebook

Check out the wiki for more strategies.