We’re aware of this issue, and we’ve got a fix on the way. Until then, here’s a fixed sources.list:
deb http://archive.debian.org/debian etch main contrib non-free
deb http://debian.di.newdream.net/ etch ndn
deb http://archive.debian.org/debian-security etch/updates main contrib non-free
deb http://archive.debian.org/debian-volatile etch/volatile main contrib non-free
deb http://archive.debian.org/debian-backports etch-backports main contrib non-free
deb http://debian.dc-uoit.net/debian-multimedia/ etch main
If you’d like to be upgraded to Lenny, let DreamHost Support know. We’ve got a process in place for running the upgrades.