I'm not sure about OHCI support on the USB side of things with this card, but it'd be mighty handy if it was works. http://inlandproduct.com/pciusb20rj-45ethernetcard.aspx

There have been some USB/FW/LAN combo PCI cards. It might be worth digging through the G3+ forum here as I recall a discussion about controller compatibility of the combo cards somewhat recently there for use in G3 AIO and desktop cases.