I just added Pd-extended beta packages to apt.puredata.info for Ubuntu oneiric and precise, both 32-bit (i386) and 64-bit (amd64). That means that apt.puredata.info now has 32-bit (i386) and 64-bit (amd64) builds for every Ubuntu release since jaunty 9.04. This also covers all recent Linux Mint releases. There is also i386 and amd64 builds for Debian squeeze and wheezy.
apt.puredata.info will also continue to have a whole bunch of older builds, all the way back to Debian/sarge and Ubuntu/dapper.
Here are directions for how to use apt.puredata.info: http://puredata.info/docs/faq/debian
Thanks to Max Neupert and Weimar University for setting up the new Debian/squeeze server that is running these new builds.
.hc