Google makes its radio debut (via Reuters)
http://money.cnn.com/2006/12/07/technology/google_radio.reut/index.htm

From the article:
Google Inc. said Thursday it has completed the development of its widely anticipated radio advertising system and has begun a limited test in which customers can buy ads via its online ad-buying system.

In a statement on the Web search leader's site, the company said it had begun a limited public test of a system it acquired through its purchase of dMarc Broadcasting in early 2006 for $102 million and that it subsequently incorporated into its existing AdWords online ad-buying system.

See Also: Post on Inside Adwords Blog:
http://adwords.blogspot.com/2006/12/bringing-radio-advertising-to-google.html

See Also: Audio Ads FAQ
http://adwords.google.com/support/bin/topic.py?topic=9324

More in this News.com story:

"Google tunes into radio ads"
http://news.com.com/Google+tunes+into+radio+ads/2100-1024_3-6141908.html