Flash AS4 - How to create online presentation which a presenter can control and a client can view.

Question

Hi,

I have a brief to create a web based flash application that enables a presenter and a customer to share a presentation, the key factor being only the presenter can change the slide of the presentation.

Is it possible to do swf to swf communication so that the presentation is updated on the client side? Or would I have to store the current slide information in a database and have the presenter swf set it via a php script and client swf load another php url to get it?

Thanks,

eb_dev