Carl,
VPLS stands for Virtual Private Lan Services and is a multi-point L2 VPN technology.
Please refer to the following URL for some good white papers covering VPLS:
http://www.cisco.com/en/US/products/ps6648/products_ios_protocol_option_home.html
Regards
Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México