We told you earlier today about Google's attempt to win eBay seller support for Google Checkout, a competitor for PayPal transactions. And to convince eBay to let buyers pay with Checkout.

eBay answered by pulling all their North American advertising from Google. Valleywag puts the number around $100 million but it might be more.

Google backs out of the event...

eBay Live attendees have plenty of activities to keep them busy this week in Boston, and we did not want to detract from that activity. After speaking with officials at eBay, we at Google agreed that it was better for us not to feature this event during the eBay Live conference. Google is constantly reaching out to new users and sellers, and we are available to privately discuss any matters of concern with individuals as they relate to Google products. Interested parties may contact us at checkout-reply@google.com.

Hmmm, whoops, sorry.

For all we know, eBay may have been planning to announce their withdrawal in the next month or two and just decided this was a convenient excuse to make the change.

Will this affect their click-to-call advertising experiments? Might that affect Skype's 2007 revenue?

The next investor conference calls for eBay and Google should be a hoot.

See more:

• Google party at eBay event will protest Checkout ban - CNET News
• eBay No Longer on Google AdWords - ComparisonEngines
• eBay and Google: The Gloves Are Off, It’s Getting Ugly ProStores Scoop - AuctionBytes
• Animosity Escalates as eBay Pulls Google AdWords, Reallocates Dollars - ClickZ
• eBay vs. Google: eBay says, normal course of business… um, ok…right - Scott Wingo
• eBay Pulls Google Paid-Search Ads To Protest Google Checkout Moves - Search Engine Land
• eBay Halting its Google AdWords Advertising? - Search Engine Journal