Yahoo have relaunched its web portal with an enormous $100 million dollar advertising campaign.

The new look portal will allow users to integrate other third party web services such as Hotmail and social networking services. The left-hand navigation now features customisable bookmarks which when the user mouses over, pop-up to show a snapshot of the site. These bookmarks include a large number of links to non-Yahoo websites such as Kelkoo and BBC News, potentially taking the user away from the Yahoo site.

Yahoo's chief executive, Carol Bartz is hoping that the relaunch will bring in more users and greater advertising revenues. Their deal with Microsoft also allows them to control the sales team which will sell banner advertising for both companies.