Wirecast’s flexibility allows it be used in some very unusual configurations. That’s the nature of a program who’s strengths range from a software switcher to a streaming encoder and recorder.  A year ago, when I visited the Gotham Girls Roller Derby, they were using 4 DV cameras with Firewire cards into a MacPro, with Wirecast serving as the switcher and encoder.  At this time, they were contemplating the costs and the practicality of going HD.