Our plan is to first include Live video feed from online sources. This will allow for quick addition of video to your signage without the need for a tuner card. We will support Tuner cards prob by 2nd quarter of 2009, first for Windows and later for Linux.
We plan on using the VDub API so all tuner cards will work just fine once we include this functionality.
I still think that if we can find enough sources of free video casts online, this should fill most of the need for live video content, at least for now...
Regards,
Sean.