Interesting blog entry with lots of pictures of the offices of the six most popular social networks:

Top 6 Most Popular Social Websites And Their Office

I particularly like the Twitter office, where I think the inclusion of the Twitter profile background designs on the walls of the office space is a nice touch!

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Updated 2021 : note that the above post was originally published in 2010, but is left here for archival purposes. As I am writing this in 2021 during the Covid pandemic, with everyone in tech working from home, it is amusing to think that in the past tech companies competed with each other, at great cost, to have the most attractive office space for candidates.