Debian comes with non-free blobs. Taking the first Debian system to hand (Etch) and pulling the kernel source I see the very first file we remove is in there (drivers/atm/atmsar11.data) and many others.
Ubuntu adds a few (and I believe is taking the kernel from kernel.org rather than Debian these days), but Debian is not all-free.
An anonymous reader writes "gNewSense, the fully-free GNU/Linux distribution sponsored by the FSF, has released a 2.1 livecd(torrent). Since the last release more non-free binary blobs have been removed, new artwork has been added and lots of other improvements have been made. It's also two years since the first edition of gNewSense, and in that time an impressive ten livecds have been released! gNewSense 2.1 DeltaH is based on Ubuntu Hardy, and removes non-free software that other distributions don't. Try computing freedom today!!" Link to Original Source