Answers
Walt Mossberg reviews Answers.com in the Wall Street Journal, and finds a lot to like:

"Answers.com is also a start toward a new search paradigm where the object is to provide real instant information, not just links to pages where that information may, or may not, be found. I urge you to try it."

And, on another place to find real answers, a discussion on the Newslib forum mentions that some current Census data finds its way to the U.S. Statistical Abstract even before it shows up on the main Census site. I can't emphasize enough what a great tool the Stat. Ab. can be, but I find some researchers and reporters don't know about it, or, in the case of a recent posting on NICAR-L, I think, suggest finding the hard copy in the library. The book is great but I find the online version even easier to use if you're familiar with the book. If you're not, it doesn't take long to figure it out, and there's an online index to browse/search. And, even better, I just discovered something I didn't know: the Census has put older Stat. Abs online now, too, along with the wonderful Historical Statistics of the United States, Colonial Times to 1970.