On a related USB note, I'm going to pick up one of these for adding USB ports to the G4. Looks pretty slick, should allow for some good custom installs with USB ports hidden away, and this has been the only "squid" hub I've seen with extra power. Just need to feed it down the 5v line of the red USB connector.
http://www.radioshack.com/sm-gigawar...i-2498117.html
Not in stock online, but shows in stock at most of the stores near me. Will report more on how it works later.