Rochester Institute of Technology (RIT), Rochester, New York, USA does have a huge graphic design arhive. The guys from Underconsideration took over 30 logo pictures you may find interesting.

caterpillar logo design

ibm logo guides

ibm logo guide | Do not alter the logo, even in humor
Margarit Ralev
Margarit Ralev is a freelance web designer since 2002. Ralev.com design portfolio was started in 2004. In 2006 he registered "Ralev.com OpLtd.", a company providing all sort of advertising designs. Since 2008, the company focused on brand identity design and brand consulting.
Margarit created Logoblink.com in 2007, as a 100% logo design blog.
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2 Responses
Hehe, the last picture is nice. And also, it is so true.
Well, I adore the last one, too :)