http://socialsoftware.weblogsinc.com/2006/02/28/flickr-article-in-usatoday-yahoo-kept-promotion-low-key/ points to a nice article in USAToday about flickr at http://www.usatoday.com/money/industries/technology/2006-02-27-flickr_x.htm
http://socialsoftware.weblogsinc.com/2006/03/04/huge-directory-of-web-2-0-sites/ points to this list by category of Web 2.0 sites & services at http://www.econsultant.com/web2/index.html