HD Hard Drive Based Camera To Stream

Hello ,

I need to purchase an HD hard drive base camera that I can stream video directly from for a ustream show. All the cameras that I have researched are all old Min DV cams that have this capability because the new cameras do not come with firewire.

Even if there is a way to plug the camera into a DVR device and stream directly to my computer would work as well. Any solutions at all I'm open to, Thanks!