Very interesting.

This morning, the Official Google Blog announced that the search giant has acquired reCAPTCHA. The company provides a service that combines two things that Google would be very interested in: it verifies that information provided to a server has been entered by a human and, in the process, helps identify difficult-to-decipher text from book digitization projects. As such, it’s a natural fit for Google.

http://tinyurl.com/pt92xe