remote photo triggering

Hi guys,

I have a cool question for you:

- let's say I have 5 exactly same HTC phones
- and let's say I want to make a photo with their cameras at the same time, from different angles, of course
- and I suppose that has to be triggered remotely (from one computer with Linux or whatever is needed)

How would you go about it?
I'm really interested to hear your thoughts.

Thanks for your time upfront!
Dushan, Europe