I suggest we create a Facebook page for CogSci.SE
The majority of students are on Facebook. Many have created groups for their university, department or class. If one of these "likes" our FB page, we'll have a lot of exposure among our target audience.
All we would need are some nice images (profile and header) and a concise description that attracts the relevant target audience. The images could be free stock images, meaningful graphics (like an intelligence bell curve) that we could create ourselves and discuss here (on meta or in chat), or screenshots of the site header, if we have nothing else.
The profile picture could be of our most attractive member, on which we could hold a vote ;-P
If we want, we should be able to integrate the two sites so that new questions automatically appear as posts on the FB wall. I wouldn't post each answer. This would be an automatic process that takes no effort or time, once it is set up. If we want to go beyond that, we could manually select choice questions or answers, or wait with posting until questions have been reviewed and edited (some questions need this to be representative). Ideally questions asked on FB would appear here automatically as well, and be answered here.
StackExchange on Facebook:
Some Stackexchange sites on FB:
If we create such a FB page, we'd need to use an email address that all the moderators have access to (and no one else).