tidbits: you can post little factoids about yourself in your profile. your tidbits are shown randomly every time someone views the page, so be sure to post a lot of them!
slow connections: slow internet connection? use the plain layout (in your settings) to speed up load times
unread mail: the little number next to your mailbox is the number of unread messages you have -- these messages are either from your friends, or they're notifications from avalantern
other users: talking about another user in your post? link to his/her profile by adding tildes around his/her name! for example, ~thelowlypeon~ will automatically become a link to the lowly peon's profile!