We just bought a new printer and since the Airport Extreme has only one USB port, now I need a hub to connect both the network drive and the printer to the network. I had one lying around, and it seems to be working fine.
I noticed performance writing to the network disk, though, is REALLY REALLY suffering. It's way slower than it was when it was plugged straight to the Airport, like by a factor of ten or more.
I just figured it out... This is a USB 1.1 hub. Duh. Everything's running at about a megabyte per second. *sigh* Time to go buy a better one, I guess, and relegate this one to syncing my phone and my iPod.