I would not suggest you do that. There are a plethora of services that you've described. What will differentiate yours?
http://old.ycombinator.com/ideas.html
There's also a new updated list : http://www.ycombinator.com/rfs/
I am just fishing for ideas and suggestions because I want to get to work on one of these ideas by building a prototype and getting users to test it.
Just wanted to post these ideas here to get some feedback and discussion so I can settle down on 1 idea to work on ...
I suffer from chronic indecisiveness and find it hard to decide alone, so I am posting these ideas here to get some feedback and discussion on what might be the best one to work on that can potentially get many users to love it ...