I thought SWA wasn't looking too hard at codeshares, till I read this in the SWA 3rd quarter filing;
During early July 2008, the Company announced its intention to enter into a codeshare agreement with Canadian carrier WestJet. This relationship is intended to allow the carriers to offer Customers a seamless travel experience to a wide array of destinations. The Company and WestJet plan to announce codeshare flight schedules and additional features regarding the relationship by late 2009. Certain details of the codeshare and elements of the alliance are subject to approvals by both the U.S. and Canadian governments. The Company is also continuing to consider codeshare opportunities with other carriers, both domestic and international.