This was bound to happen sooner or later, that's my take on it. Summize is a social search engine created soley to search Twitter, why wouldn't Twitter want it. It's a great buy for Twitter, added to their site this is a great asset. Twitter needed a good search engine for their site.

"The one thing that remains a mystery is the acquisition price. Twitter hasn't raised a huge amount of money and Summize had almost a million dollars in funds raised itself. What percentage of its coffers did Twitter just spend on all the Summize technology and five employees?" ~Marshall Kirkpatrick, ReadWriteWeb

Does anyone know what the cost was? It would sure be interesting to find out.

Twitter immediately changed the name of Summize to Twitter Search, no imagination, and they changed the URL too. I'm not seeing a link to Twitter Search from my Twitter page though. Odd, you'd think they would do that right away too.