Taken from the wiki:
"In a wireless network, the PPPoE server may be attached to an Access Point (as well as to a regular station of wireless infrastructure)."
Does that mean it is common practice to set up PPPoE server on wireless station, i.e. Groove which works in CPE mode? And a SoHo router would be attached to the Groove via Wan port and authenticated through PPPoE? That will work?