iPhone / Android Social Networking App - repost

We have an urgent requirement for an iPhone and Android app that will function with our Jomsocial Driven Joomla website. For Jomsocial we currently have two profiles available. How the application will work will depend on the type of profile the user has. Key Features: Users must be able to see who is available online and send an instant message to that user (push notification). The application must be able to run in the background of the mobile device, with the user being able to set their free / busy status via a user friendly calendar page. On launching the application the users location needs to be shared, and a Radius search of members in their area performed. The apps must be scalable as we intend to continue to revise the product. The initial version of the App should be available to a UK audiance. We would like the application to integrate well with Jomsocial recording information in the MySQL data tables for the Jomsocial component. I know this is a little vague, but we don't want to give too much away on the public site. Please contact us to find out more. Pre-requisites: Must be familiar with Jomsocial API Experience of working with Jomsocial on a mobile platform. This is to be developed as a HTML5 App.