[inswva]

Does the Airreak ROM have Internet Sharing cooked into it? If not, download the Internet Sharing .cab and install it. Run the app, hit Connect, and plug your USB cable into the phone and the laptop. Linux should recognize the connection as a wired connection. I'm typing this message on my Lenovo Thinkpad running Ubuntu 9.10 tethered via USB to my Omnia.

I also use WMWifirouter for wifi tethering as well. I actually purchased it quite a while ago and am now running v1.60 which works great. If you are willing to "upgrade" your ROM there are several ROMs on omniarom that have a free wifi tethering utility cooked in. I'm running Waremike's latest ROM which has it, even though I don't use it since I have WMWifirouter.