Google Buzz

Google has now introduced Google Buzz in Gmail. I guess Google is gone mad and wasting its energy and resources on things which are of no use. First orkut, then google wave and now google buzz. Why they are stressing on social networking? whats the point of creating google buzz when there is already google wave. First point is that i dont see much difference in google wave and google buzz except the real time and single threaded stuff in google wave, secondly if there is something new then why not introduce it in google wave? why google buzz??? i cant figure out the answers to these questions. Google is a brand name, and they are known for creativity and quality, so they should focus on introducing new stuff and ideas rather than wasting time of others and themselves in such lame social networking stuff which are already introduced by others and are prevalent in the market.