Following Edward's email I would encourage anyone involved in editathons or who is interested in becoming either an online or campus ambassador to check out:

Wikipedia:Education program/Ambassadors

At the bottom of the page are links to apply for online and campus ambassador userrights. These then show up on the Wikipedia:Education noticeboard. Established Wikimedians will have no problem getting userrights, but sometimes the process needs a bit of nudge to get it sorted out a bit quicker.

Of course, obtaining campus or ambassador userrights also enables wikimedians to interact more effectively with students on one of the courses, whether in the UK or further a field.

One issue that warrants further consideration is the extent to which students get involved with Wikipedia in one of these courses, but never appreciate the existence of the broader Wikimedian community around them. Whilst we wouldn't want to be disruptive to the class by pushing community involvement too hard, we can explore appropriate ways to highlight opportunities to the students with the approval of the academics running the courses.

I think there is a lot of room for thought about this.