When capturing live video from the HVX onto a mac w/ final cut pro (basically using the mac as a firestore), can I do all of the variable frame rate stuff? Or do I lose those capabilities because I'm streaming through firewire?
Nope, you don't need to be in Native mode. I do it all the time. The signal that gets send down the Firewire cable gives a file identical to what gets put on the FS-100. When you record VARIABLE frame rates, dissable the pulldown option when you ingest the files, and once ingested into your project, you will use FCP's DVCPRO-HD Frame Rate Converter tool. It it doesn't show up in your Tool menu, it's on the FCP 5.1 installation DVD. Just drop it into your Plug-ins folder.