2006 SEO Sites Social Network 
socalTECH
NOVEMBER 12, 2008
Matthew Graczyk is founder of angel-backed Zubican (www.zubican.com)--saw a problem, which was the difficulty of finding suppliers for products for businesses--and decided to solve the problem, with a site specifically targeted at helping B2B buyers and sellers connect. It's a full-blown, B2B social network.
Both Sides of the Table
MAY 15, 2010
StackOverflow is a free Q&A site for software developers, blending functionality from wikis, blogs, forums, and social voting (similar to Digg/Reddit); 7.1mm unique visitors per month; new funds will be used to build out engineering team and build out product. . Founded in 2006 by Aaron Finn.
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