Badges update automatically and link to the plugin page on MineUniverse.
If you want to add request teleportation to your server, but don't want tons of other features eating into your memory or CPU time, this is the plugin for you, because this plugin only contains request teleportation.
Request teleportation: you type a command which asks another player for permission to teleport to them. If they accept, you are immediately teleported to them.
Despite the current version being for bukkit 1.2.5, this plugin still works as of 1.4.5. I hope to update within a month or so.