Hi guys, I'm in process to make a web TV, I bought yesterday a fire wire 800-400 for the other camera that I want to use. Now, I'm plugging 2 cameras using the 400 firewire and the 800 fire wire inputs that on the iMac. After that, I use Cam Twist to choose between the cameras, but the thing is I could not choose any camera and it's just black, nothing there. Even I went to quicktime and choose my video source to make sure is going to work, but nothing happen, I could use the Isight camera and one of the others video camera but not two of them. My question is: can I use 2 video cameras to stream web Tv from my imac? is there any third party that I can use to help me choose between my video sources? Thank you in advance and sorry for the long post.