How do to get User Activity of friends?

[eluser]bretticus[/eluser]
This really isn't that hard. You need a table to store actions that EVERYONE performs. You need a table that maps a friend to a user. You need a user table to store user details (in particular an auto-incremented user id for the aforementioned map table.) Finally just query the action records by joining the three tables and restrict to friends by using a where clause on the map table to friends of the current user only.