The Internets are alight with speculation about Google radio ads, since Tim at TechToolBlog reported receiving a survey that touched on talent brokering for voice work. Back in May at Google Press Day, CEO Eric Schmidt told me (and other reporters hanging on his every word) that he envisioned a system whereby advertisers could upload audio creative to Google that would be distributed to multiple platforms. The idea that the company would help provision voice talent would be perfectly consistent with this approach, given the lack of resources available to many of Google's small business customers. (As others have mentioned, SpotRunner /A> -- the next logical acquisition for Google -- aims to handle the creative and distribution issue for TV.)
Then again, given Google's fondness for technology, maybe the company could do dynamically-generated audio creative like IHT.com is considering.