OT: Software switching

Greetings All!

This is a bit off topic but being a forum that I frequent it's clear there is a lot of talented minds lurking here so in addition to posting on the "Event" form I thought I would ask you guys & gals for some direction.

Looking to stream video of a radio talkshow.
The setup is an interview table with 3 people, appropriate lighting and a consumer DV camera for each person.
The question is... using the cameras firewire, is there a software solution (Mac or PC) for switching?

Thanks for your time!

Tim