ftp://82.96.64.7/pub/linux/kernel/people/akpm/patches/2.6/2.6.21-rc5/  direct

[DIR]2.6.21-rc5-mm4/  direct  304+ twin directories
[DIR]2.6.21-rc5-mm3/  direct  304+ twin directories
[DIR]2.6.21-rc5-mm2/  direct  304+ twin directories
[DIR]2.6.21-rc5-mm1/  direct  152 twin directories