The Google blog has announced their acquisition of Aardvark, a 'social search engine' whereby users can login to ask questions and get responses from other users. Set up by ex-Google employees, Aardvark analyzes questions to determine what they're about and then matches each question to people with relevant knowledge and interests to give users an answer quickly (stated to be within 5 minutes), either by email or through instant messaging.

As with all Google's acquisitions, they tend to spot a good opportunity and a new service that could become more mainstream in the future. You can visit the Aardvark site here: http://vark.com/ask