I’ve created this handy overview of user permissions. Basically all users after registration start on trust level 0 (New User) and their trust level is increased with their participation (by visiting, reading and posting). One exemption is Leader (tl4) which is promoted by admin manually.
Want an illustration?
Visitor → Novice → Regular → Leader → Elder
Seems like great starting point for our user trust system, though we changed a few names. So in our case it is as follows:
0 (New) → 1 (Basic) → 2 (Member) → 3 (Regular) → 4 (Leader)
Your current level is visible on your user page. When reaching new level, you will be notified about new user badge.