I've seen a lot of talk about this, but no, I haven't tested or thoroughly investigated this, as I have no need for it, since I have two FW ports on my MBP. However, the concept is not beyond reason, since the IEEE 1394 interface standard includes this possibility.Do you know for a fact that these work? I've been reading about this very product on other forums and it appears that this won't work without drivers on the Apple OSX side. I'd love for this to be true, but so far it appears that this is a no-go...but thanks for the thought.
[I've also researched and found that this is for a network cable tester, but the idea of firewire over ethernet would require drivers, no?]