You could set up a facebook “like” page that links to this site. Here’s an example:
http://www.facebook.com/group.php?gid=92881589623
It will help if you include “Buddhist” as part of the name of the Facebook page (maybe…Buddhist OneSangha.org)…so that when FB users search for “Buddhist” they find the OneSangha page.
Also, consider adding Facebook “like” buttons to the OneSangha site. You can also add a Facebook “like” box on this site (Wordpress widget).
Once you have the Facebook page set up, you can comment on posts made on other Buddhist-oriented page walls which will greatly increases OneSangha’s exposure.