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.
Notifications
notification needs to be improved as there is no need to receive a notification, if the note/reply etc. have been deleted by the submitter. ie) if you replied or posted something you really shouldn't of no one gets your note, links etc that were included. - Steven G.
An easy way to track conversations, so that you can be notified when someone else replies to a note you have replied to. - aaronbassett
The option to receive a daily digest of notes & replies. - Joel T.
Receive Notification from users who have accepted your friend requests, no matter when that request was made - Steven G.