http://www.worth1000.com/
Design and photoshopping or photochopping competitions.
http://www.nicora.net/yh/webtoodotoh/default.html
A team of designers applied a Web 2.0 look and feel to a selection of well known corporate logos.
http://www.logolounge.com/articles/default.asp?ArticleID=540
Yearly logo trends from LogoLounge.com