App Development - iPhone, Android and BlackBerry

Hi We are looking to develop a mobile Application and a Desktop Website. The main features of the app will be following: 1) Login with LinkedIn, Facebook ID or Create New ID 2) Allows users to set their profiles, mark private and public information 3) Allows users to IM each other, with option to block IMs 4) Creates tag directory from profile tags of users 5) Searchable tags 6) Podcasting, Videocasting with push notifications 7) Quizzes which users can take and get scored 8) News Page with external links 9) Mapping of users 10) Records number of select type of videos completed on user profile for awarding marks. 11) Videos/Audios that the user completes in a given number of months increasing star rating of the user. this shows on profile. 12) User can share via Bluetooth, Wifi or NFC their "playlist" of video courses 13) Allows users to turn-on radar that uses Bluetooth or Wifi signals to find out if there are other app users nearby.