Excerpted from the GlobalClassroom blog:
The #tourdemoodle on Twitter is an activity started a few days ago by @catspyjamasnz. Basically a few twitter users have been sharing their favorite sites so that everyone can get a look at what other Moodles look like. I submitted GlobalClassroom.us (which has a plain theme on the inside, but a heavily modified landing/company website as the landing page) and a few other sites that I know of.
There are some great Moodle sites available on the world wide web. If you have one, and an account on Twitter then do share with the #tourdemoodle tag.