The typical answer is to use a router to do the
job. Sympatico in Canada moved to PPPOE a number of years ago, before PPPOE support was common. People were forced to use a crappy client on Windows (98?), and David Skoll wrote rp-pppoe as a reaction.

Most people I know have routers that they control to act as the PPPOE gateway, so they can network their home devices easily without dealing with pppoe on each.

For example, little network printers, etc. It
complicates matters to deal with PPPOE on
every typical home device. Wii, xbox, etc. (Plus you can't control what home traffic is traversing out to the ISP.)

It would be interesting to see the details of what they've done. Ie, do you get an IP before you negotiate PPPOE? Or do you do some point-to-point wlan connection, then negotiate PPPOE?

Good luck!