yeah... <blush> I just tried this on my openSUSE 11.1 laptop and it worked strait away as USB0, no drivers, no installation, no problem....
I really should have tried it before posting!
And yet another bit of hardware that works more easily with Linux than Windows! ;)
Interestingly, the Tethering isn't limited to the 'Mobile Networking' (aka 3G/HSDPA) connection.
If you have Wifi configured on your Hero, that is the connection the Tether will use, pretty nice if you want to Wifi-enable any device and save on your data limits.