Lately I have been using two Linux distros with kernel 2.6.
Thanks to Greg's excellent step-by-step instructions (message number
41979) tun/tap (and therefore TCPIP connection from the guest to the
outside world) has worked perfectly.
For those using Mandriva 2005 LE (the free download version of MDK
10.2), Greg's step 4 poses a problem: there is no
/etc/udev/permissions.d/ directory in this distro. To set the
permissions correctly, I replaced Greg's step 4 with the following: