GUESS?, Inc. (NYSE:GES) today announced that its vertical marketplace, the Apparel Buying Network began processing purchasing transactions with its specialty retailers through the use of the Plumtree Corporate Portal, the market-leader in portal technology; the Commerce One MarketSite Portal Solution from Commerce One, Inc. (NASDAQ:CMRC), the leader in global e-commerce solutions for business; and Peoplesoft e-Procurement, an end-to-end eBusiness solution that integrates seamlessly with PeopleSoft enterprise systems. PeopleSoft eProcurement was implemented by PeopleSoft Consulting. The GUESS? portal, the Apparel Buying Network at www.apparelbuy.com, will initially offer 900 specialty retailers the opportunity to access online ordering, order status information, business intelligence reports, and corporate documents pertaining to policies and procedures.