IPhone/Android/Blackberry Application Platform

Our company wishes to develop an IPhone application platform to host our clients applications.
The first application we wish to develop on the platform is specified in part one of our proposal below, we will then go onto explain the constituent parts of our platform in detail in part two.
Part one – The White Label Application
The first application we wish to develop on our platform is a ‘knowledgebase’ type application similar to the IPhone application ‘How stuff works’ but the subject will be different, and confirmed at a later date.
See the following link;
http://itunes.apple.com/us/app/howstuffworks/id401986544?mt=8
Key Functionality (see diagram in appendix a);
• Search functionality, by subject
• Posting comments under a subject (without log in)
• ‘Home’ button to go to main screen
• ‘Watch’ for videos menu
• Read for articles on the selected subject
• A-Z of subjects
• Link to social media, Facebook, Twitter etc
This will be a free to download application with advertising incorporated within the app.
To manage the articles and subject media we require a content management system to be built & incorporated with the website , which is an extension of this application. (Link to website is required).
Part two – The Application Platform
Our aim here is to develop a platform, which hosts the content for our clients and allows them to manage their assets amongst their various application. We will begin with IPhone application however are keen to ensure that we can ‘plug into the android and blackberry platforms (should a client want to extend their app from IPhone to android/blackberry, for example.)
We will have a developer in the UK working alongside us, adding applications to our platform as we develop them but require a team to build the platform to the specifications below, we would welcome any comments in terms of issues and on how best to build this platform.
The constituent parts of the platform are as follows see appendix B for the diagram);
• Content management system, so clients can manage the media on their application (either linking into their current website CMS or stand alone.
• Enabled for viewing video
• Storage database
• Two way communication (email)
Design
For the white label application & the platform outlined above, we require design work to be done in line with our specifications. Our vision here is that the design should be in line with the top designed applications such as ‘Last FM’ and the ‘BBC’ app.