Rather than do the usual Where-The-Hell-Is-A-Working-Mirror dance, Razen and I have stumbled across this mirror of the Slackware 9.0 ISO which seems to have been overlooked. (I can't get the bloody thing from any US mirrors, but a dinky server in Norway is feeding me at an average 135K/s. @#$%&*!)

Slackware 9.0 ISO