Found this article while digging this evening.
It seems that topping this ‘Top 10’ list for large databases is The World Data Center for Climate (WDCC), operated by the Max Planck Institute for Meteorology and the German Climate Computing Center.
The WDCC has 220 terabytes of web-accessible data, plus another 6 petabytes of additional data. (Three times the total information in all the US academic research libraries combined.) I would hate to see how that ran on anything slower than their 35 million euro supercomputer!
I should also mention that in the comments section several even larger databases are mentioned in the traditional, post-top-10-anything-countdown, hey-what-about-so-and-so fest.
