[dvd::rip] PGP key for Debian dvdrip

[Jim McNamara <jim.mcnamara@xxxxxxxxx>]

Hello all! I tried to install dvdrip from apt this afternoon, and ran
into a strange problem. This is my current sources.list

deb http://ftp.debian.org/debian/ unstable main non-free contrib
deb-src http://ftp.debian.org/debian/ unstable main non-free contrib

deb http://ftp.us.debian.org/debian/ unstable main non-free contrib
deb-src http://ftp.us.debian.org/debian/ unstable main non-free contrib

deb ftp://ftp.nerim.net/debian-marillat/ sid main
deb ftp://ftp.nerim.net/debian-marillat/ sid main

When I run apt-get update, I see this error:
jim@musicbox:/var/lib/apt/lists$ sudo apt-get update
Get:1 http://ftp.us.debian.org unstable Release.gpg [189B]
Get:2 http://ftp.debian.org unstable Release.gpg [189B]
Hit http://ftp.debian.org unstable Release
Hit http://ftp.us.debian.org unstable Release
Hit http://ftp.debian.org unstable/main Packages
Hit http://ftp.us.debian.org unstable/main Packages
Hit http://ftp.debian.org unstable/non-free Packages
Hit http://ftp.debian.org unstable/contrib Packages
Hit http://ftp.debian.org unstable/main Sources
Hit http://ftp.debian.org unstable/non-free Sources
Hit http://ftp.debian.org unstable/contrib Sources
Hit http://ftp.us.debian.org unstable/non-free Packages
Hit http://ftp.us.debian.org unstable/contrib Packages
Hit http://ftp.us.debian.org unstable/main Sources
Hit http://ftp.us.debian.org unstable/non-free Sources
Hit http://ftp.us.debian.org unstable/contrib Sources
Get:3 ftp://ftp.nerim.net sid Release.gpg [189B]
Hit ftp://ftp.nerim.net sid Release
Ign ftp://ftp.nerim.net sid Release
Hit ftp://ftp.nerim.net sid/main Packages
Hit ftp://ftp.nerim.net sid/main Packages
Fetched 191B in 1s (114B/s)
Reading package lists... Done
W: GPG error: ftp://ftp.nerim.net sid Release: The following
signatures couldn't be verified because the public key is not
available: NO_PUBKEY 07DC563D1F41B907
W: You may want to run apt-get update to correct these problems

Running multiple apt-get updates just continues with this problem, yet
I see apt tried to download the Release.pgp file from the server. I
even copied the Release.pgp file from the web interface for the
server, then created the correct file in /var/lib/apt/lists, and then
apt complained that:

jim@musicbox:/var/lib/apt/lists$ sudo apt-get update
Get:1 http://ftp.debian.org unstable Release.gpg [189B]
Get:2 http://ftp.us.debian.org unstable Release.gpg [189B]
Hit http://ftp.debian.org unstable Release
Hit http://ftp.us.debian.org unstable Release
Hit http://ftp.debian.org unstable/main Packages
Hit http://ftp.us.debian.org unstable/main Packages
Hit http://ftp.debian.org unstable/non-free Packages
Hit http://ftp.debian.org unstable/contrib Packages
Hit http://ftp.debian.org unstable/main Sources
Hit http://ftp.debian.org unstable/non-free Sources
Hit http://ftp.debian.org unstable/contrib Sources
Hit http://ftp.us.debian.org unstable/non-free Packages
Hit http://ftp.us.debian.org unstable/contrib Packages
Hit http://ftp.us.debian.org unstable/main Sources
Hit http://ftp.us.debian.org unstable/non-free Sources
Hit http://ftp.us.debian.org unstable/contrib Sources
Get:3 ftp://ftp.nerim.net sid Release.gpg [189B]
Hit ftp://ftp.nerim.net sid Release
Ign ftp://ftp.nerim.net sid Release
Hit ftp://ftp.nerim.net sid/main Packages
Hit ftp://ftp.nerim.net sid/main Packages
Fetched 191B in 1s (107B/s)
Reading package lists... Done
W: Bizarre Error - File size is not what the server reported 189 190
W: GPG error: ftp://ftp.nerim.net sid Release: The following
signatures couldn't be verified because the public key is not
available: NO_PUBKEY 07DC563D1F41B907
W: You may want to run apt-get update to correct these problems

How can I import the correct pgp key so I can use the debian
repositiory for dvdrip?

Thanks,
Jim