/Follow UI Mod

http://wow-en.curse-gaming.com/downloads/details/2941/

FollowMe 1.2 Author: Kinyen (druidkinyen@hotmail.com)

This AddOn allows party members to put you on auto-follow. Most useful when people suddenly go AFK without telling anyone. Normally, players can auto-follow any other player, but since this AddOn allows other people to control you, it will only allow members of your party to put you on auto-follow.

FollowMe is different from FollowTheLeader in that it requires the follow commands to be at the beginning of whisper (i.e. "!follow"). That way if someone is whispering directions to you like "Simply follow the path south", you won't automatically start following them. :)

No idea if this supports 2.0+ but I came across it and figured somebody might find a use for it.

I desperately miss this mod, and sadly it doesn't function in 2. It actually didn't function earlier then that, one of the patches removed the ability to automatically follow.