As far as shell shock is concerned, you can add them by going to last game and clicking the little button and they'll be SSL friends. As far as AG is concerned, all you need to do is go to their profile and click add friend. Requests will not be added until AG3. To look them up type http://armorgames.com/user/USERNAME in the url.
Lol, there is also a user called: Literary, nothing. xD
@OP
If you like Shell Shock Live that much, join the clan. I have seen the SSLC around the user's profiles but you may have to have a thorough search for them.