I'm trying to setup IPCOP as my firewall, with an HSDPA card as the red interface and a LAN connection to a wireless access point distributing IP to client machines as the green interface. The easy part was getting DHCP to assign IP addresses to the client machines - that's working fine. The hard part seems to be the 3G dial out bit. I'm a Linux newbie, so I know jack about it -- please be kind with the flames :-), but I'd like to know if anyone has done this and how it was done.
If not, I'll try to trailblaze, but it'll not be pretty - like trying to drive an F1 car without a basic driver's licence...