Yahoo starts giving tough time to Google guys . . .

Google AdSense and Yahoo Publisher Network’s Fight For Publishers

The battle for publishers between Google AdSense and Yahoo Publisher Network is heating up beyond CNN and Washington Post as Google AdSense representatives are now telephoning some old AdSense users who made the switch over to Yahoo Publisher Network. Google is asking publishers to come back to AdSense and possibly even negotiating higher payouts with premier publishers, something that Google AdSense has done in the past (no link, but have had discussions with such premier publishers).

This explains the latest ‘TIP’ which Google is showing in the AdSense interface(to the right of Today’s Earnings when you log in) : Is your phone number correct? Please visit the account settings page and make any necessary updates to ensure that you can be reached at the phone number associated with your account.

I would love to see this escalate into a double-ended price war where both companies gradually increase revenue for publishers and reduce cost for advertisers. (Classic example of duopoly benefiting the end customer) .