Does anyone know is there a mod out there that allows a user to tag friends (much like facebook) and their friends are then viewable in each others profiles?<

Look for the "YourSpace mod" that sort of does what your wanting.<

There was another one 3-4 years ago called the "buddy mod" or something similar - would let you know your buddies' online status. Not sure if it was written for early 3.4 Snitz or late 3.3 Snitz, somebody may still have it, I don't.
If someone has it, I can update it to 3.4.06; but I have too many other things going on to write it from scratch.<