The original Debian packages of the BlueZ library and utilities were maintained by Edd Dumbill. He writes about updates and other useful information in his behind the times blog. Nowadays they are maintained by a team of packagers.
In general every new or updated Debian package is included in the unstable branch and updates to latest stable branch are not made very often. This means that if you run Debian Sid or later it is enough to install the bluez-utils package to get full Bluetooth support.