A Lightpipe<>FW solution has the advantage of portability between FW-equipped systems, but it seems the few products that were available are no longer made or supported. Perhaps because Apple have been dropping FW.
It is more likely that they just didn't work reliably enough. It takes a great deal of effort to make a reliable FW interface and the manufacturers probably just couldn't justify spending that amount of effort on a small market.
In my experience FW video devices work much better than most FW audio devices - which is odd when you consider how much more data bandwidth video requires.
JRP Music - Audio Mastering and Restoration.