If you are unsure whether or not a site can support a subdomain on its own, it can't.
/ year = 1988 IndyCar season/1988
/ titles = PPG Indycar World Series
/ title years = 1988
/ awards = Indianapolis 500 winner
/ award years = 1985 Indianapolis 500/1985
"Daniel John Sullivan III", better known as "Danny Sullivan" is a former American racing driver. He earned 17 wins in the CART IndyCar World Series, including the 1985 Indianapolis 500. He was series champion in 1988 CART season/1988, third in 1986 CART World Series season/1986, fourth in 1984 and 1985, sixth in 1990 and seventh in 1989 and 1992.More Danny Sullivan on Wikipedia.
Heck, Google Talk doesn't even feature a box to let you search for things, as rival products from AOL, MSN and Yahoo do.
It just adds to the Google lustre. He would be a smart visionary and leader.
For the smaller services, the challenge is to make some kind of a case for why people would want to stay with them, ... They can argue today that they are more mature and they can offer more tools. This isn't a death knell for the smaller services, but this is a door slamming for them growing more.
So the butler is safe?
SEOs will be much more fragmented on different platforms within social networks. It'll help eliminate a lot of the search spammers, but is going to impact on anyone who gets rankings on search engines without having good content.
You could add a billion pages about Britney Spears and that doesn't mean the quality of results will be any better. There have been times when other search indexes have expanded, and the results have actually gotten worse.
Overall it looks interesting but I don't know if they have anything that the other people couldn't match if they are lacking.