ftp://ftp.wustl.edu/pub/linux/distributions/  direct

[DIR]fedora/  direct  1000+ twin directories
[DIR]ubuntu/  direct  250+ twin directories
[DIR]centos/  direct  96 twin directories
[DIR]centos-beta/  direct
[DIR]edubuntu/  direct  99 twin directories
[DIR]K12LTSP/  direct
[DIR]debian/  direct  1000+ twin directories
[DIR]knoppix/  direct  116 twin directories
[DIR]mepis/  direct  9 twin directories