It's easy - just select the desired access level, copy this link and send it via email, instant message, etc.Link: Just a link to your wiki. Post this anywhere and people can ask you for the invite key.
This page contains videos I have viewed on YouTube and have included on my playlist. Each of these video clips have been correlated with our North Carolina Standard Course of Study. Students can copy and paste links to individual learning projects, their blogs, wiki pages, or even their own social networking sites.