Facebook App creating

Hi, I would like a facebook application creating for my current website which connects to the current site database. You can visit the current website at [login to view URL]%itishre%[login to view URL] (remove spaces). Obviouslly theres only the front end to build into a Facebook application not like the admin panel etc. Plus it could be a lot less advanced as the main site. Only wants to be fairly simple like logged in area, sign up, visit offers thats about it. Another site which is similar to our ste has a facebook application for their site and we can show you theirs as an example. Thanks a lot. Kind Regards, Matt