Facebook application modification

We have a Facebook application for our web site : It has the "connect" feature and it's now used to invite friends (to the application and site membership) and posts to profile's wall after installs. What we want to further develop is : 1. Keep track of the invites (tracking if the new install is from an invitation, getting the profile id of the inviter) from [login to view URL] and also wall posts after installations. 2. We want to show on our web site (users account page) which friends are using the app, and which are invited by him. 3. We want to count statistics of user activity (sent invitations, accepted invitations, etc.) 4. We want to be able to post to users wall occasionally. We want an experienced programmer for fast and good quality work. Give your best bid, don't have a big budget for this work. But we will work with the awarded bidder for further developments.