Kayak is a travel search site that went up in beta back in October, as Gary covered more here: New Travel Search: Take a Trip with Kayak. It officially left beta yesterday and announced (link to Word document press release) that it would do a cobranded travel search deal with USA Today. It already has a partnership to do the same for AOL. The company also launched a paid listings program for its results, as covered more in this ClickZ article: Kayak.com Launches Beta of Ad Bidding Engine. A self-serve system isn't up yet, but contact details on starting are here.
Optimising Digital Marketing Campaigns with Search, Social and Analytics
At SES London (9-11 Feb) you'll get an overview of the latest tools, tips, and tactics in Paid, Owned, Earned, Integrated Media and Business Intelligence to streamline your marketing campaigns in 2015. Register by 31 October to take advantage of Early Bird Rates.