hi there,
well its a weird question
cause BT are currently selling the advertising in the BT Book, the purple one.
i think that yellow pages is being channelled more to the commercial sector, and the BT book , more to the home user, as they are trying to make it as user friendly as possible.
we are in the yellow pages and also YELL.COM, in truth, not fantastic response, but we arent really relying on that as our main source of work.
regards
martin