create custom fields in post at frontend using buddypress??

i am using buddypress plugins and theme. it is quite easy and fine. but i want to create a slambook website where user can create, manage their slambook fields like “what is your Favorite book”. And also user go to another user profile and fill his slambook just like orkut scrapbook where user go to another user scrapbook and fill something.

i am finding a lots of plugins but nothing sufficient found yet.

Please help me. i need a direction. suggest me plugin or method for this.

Thanks in advance