I'm interested in getting a LAC component up and running, specifically for concentrating PPPoE connections and tunnelling them to an LNS (running l2tpns).
From my (somewhat limited) understanding there should not be too much to it, virtually a matter of stripping the PPPoE and Ethernet headers and forwarding the PPP messages to the LNS, plus handling the PPPoE discovery phase etc.
I'd be very interested in something like this!