> Aardvark is a SMS Q&A site, you ask a question and it spams your friends with text messages, tweets etc. They were just bought by Google.

Au contraire, Aardvark was built so you wouldn't have to spam your friends. Each user of Aardvark puts his field of expertise in his settings and only receive questions Aardvark AI thinks a user can answer and it gets better with time. It's really brilliant, and it doesn't ask your friends only, it asks anyone in the community that may be able to answer your question. It's a fast way (by IM, twitter, email etc ) to ask and get answers without bothering people who don't know anything about your question.

Disclaimer: I don't work neither for Vark nor for Google. But I think it's a great service.