Oak Hills portals is the entry point to a number of applications we run on the web.
Blackboard is the LMS we use for grades 9 through 12. It's essentially a classroom online.
While our LMSs (Blackboard and Moodle) have a blogging component, we also use the very excellent Wordpress MU for running blogs. All Wordpress blogs can be accessed here.
Google Apps is a collection of useful productivity tools put out by Google. It includes such features as a word documents, spreedsheets, presentations, and wikis. Currently Google Apps are only used by staff.
Moodle is the LMS we use for grades K through 8.