Custom user profiles

I need some changes to user profiles in Wordpress basically, in a few words what i want: -user rankings based on points (option to manually add points for each [login to view URL] only points that will be added automatically are the ones from the comments - when a user makes a comment receives a 'point'.the rest are manually added from admin) -user profiles showing the points and levels (the levels are based on number of points) -when a user does an action on the site, that will appear on the user's profile -option where the user can highlight text (selecting some text will pop-up a small 'ballon' with options - inline annotations ) something like you can see here [login to view URL] if you select some text, the box with "Explain" appears. i want that box to have two options : "Correct" and "Explain" -simple admin panel where these corrections and explications will go, with option to approve or dissaprove More details via private messages. Thanks