ChannelAdvisor will continue to provide its e-commerce solutions to in an extension of a contract between the two firms through Aug. 31, 2011.

Financial terms were not disclosed.

Overstock incorporates ChannelAdvisor applications into its e-commerce store front, enabling retailers to list merchandise and process offers through one interface.

"ChannelAdvisor has proven expertise in helping retailers leverage multi- channel retailing," said Patrick Byrne, overstock’s chief executive officer. "We look forward to expanding our relationship with ChannelAdvisor and thereby providing retailers the perfect marketplace to sell their high-quality, brand name products."