Plink- A U.K. based visual search app (about the same idea of Google Goggles) has been bought by Google for an undisclosed amount. PlinkArt won last December in the Android Developer Challange. PlinkArt allows you to use your camera to take pictures to identify paintings and artwork.

"The move is part of Google’s new initiative to acquire one company per month in order to improve and expand its line of services."

Why buy? Take a look back at Google Voice, which Google bought back when it was GrandCentral. Now Google's bought Gizmo5, and Google Voice reportedly is building on that platform, too. [Boy Genius Report]