I have recently discovered the Visual Complexity website. Generally, art that excites me the most is driven by complexity and attempts to represent and communicate it. At the 9th Istanbul Biennial last year, the most impressive work for me was in this area, by Axel John Wieder and Jesko Fezer.
Exploring the site is a lot of fun.
Via CoolHunting.
Cem Sertoglu 
You might also want to check out this one http://infosthetics.com – a site devoted to statistics/data and art.
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http://www.bitforms.com/artist_rozin.html
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