WSJ.com - AOL, Google Expand Partnership, With a Key Ad-Sales Provision: "AOL will also sell some ads on behalf of Google and Web sites that outsource ad sales to Google. Meanwhile, Google will work to ensure that AOL's content appears among its search results, but says it won't compromise the integrity of its results. AOL will also receive advertising credit valued at about $300 million toward buying ads on Google.
AOL and Google will also make their instant-messaging software compatible. Google users will have to set up AOL Instant Messenger accounts to make the services work together."