Release announcement was made (via the linux-hotplug-devel list) about 3 hours ago; the message isn't in any of the ML archives that I've seen yet.
ChangeLog is here:
http://git.kernel.org/?p=linux/hotplug/udev.git;a=blob;hb=HEAD;f=ChangeLog
but there's a typo in the versions; the first section should be "changes from 105 to 106", not "104 to 105". The second section is also "104 to 105".
In any case, we should change the udev-config Makefile to use udevd --version instead of udevinfo --version | awk blah at the same time this version goes into the book. The output of udevd is easier to parse, too; it's just the version number.
Other changes that I think are noteworthy from the above ChangeLog:
- Persistent-storage support for tape devices and media changers
- Fix retry-loop in netif-rename code
- rule_generator checks for existing device names in both /etc and /dev
- Fix udev attribute names with a colon
There are also other bugfixes, documentation updates, etc.