One of the many strong points about the Debian distribution is that everybody can muster up his/her own packages. Some people actually go one step further, and offer their packages to anybody who wants to benefit from their effort. Following this custom, here is my collection.
NOTE: This requires changing /etc/apt/sources.list
to the following format (adjust to your needs):
deb http://www.fbriere.net/debian squeeze opencbm misc ...
All packages in this collection can be verified against my OpenPGP public key. (Of course, since this key isn't signed by anybody else at the moment, the web of trust doesn't extend far, but it's somewhat better than nothing.)
To enable this verification, you need to add this key to apt's keyring. Here's one of the various possible ways to do this:
wget -O- http://www.fbriere.net/public_key.html | sudo apt-key add -
Running apt-get update will then verify this archive's signature.
(See Debian Wiki for a thorough explanation of secure apt.)