Just thought people might be interested:
I had a reply back from BigPipe today to tell me they do full 1500 byte PPPoE now on fibre, 1500 Ethernet plus 8 byte PPPoE - 1508.
I'm with Spark but switching back to BP soon (BP couldn't offer fibre where I am earlier) so I asked them about MTU as a while back they only did the standard 1492 PPPoE. I get 1500 with Spark and a Mikrotik router setup for it but glad to hear BP now support it too. Saves mucking around reducing VPN MTU's because of the PPPoE overheads.