BuddyPress.org

First of All thanx to Creating WordPress and then Buddypress..I .
Okay coming to the Point
What i want is I use Limiited Tags and modified my Template to Show Tag Description when browsed post by tag. What i want is to show Follow Topic(Tag) or Get Alerts. so that whenever a new item is posted it shows in follower Profile .
I am not into that programming but i can follow instruction to do it by myself..
Please desperately looking for something like that..another option is using feed of tag and using feedburner to send alert but i dont want to create 500 feed and its just not fine..