Revolution Magazine reports that Yahoo has partnered with British Telecom to share Yellow Pages data. Yahoo will add 120,000 businesses who advertise in The Phone Book from BT within the Yahoo Local UK platform. This helps BT offer an additional service to their Phone Book customers and gives Yahoo access to some more data and marketing opportunities they may have not had otherwise.
Post Script from Greg: Yell is the dominant yellow pages publisher in the UK and was previously owned by BT before it was sold a few years ago. Yell provides all its content to Google, as the basis for Google Local/Maps in the UK.