Upstream bluez has gone to version 4.45 now, and one new thing is that it no longer starts as a system service, but auto-starts when a bluetooth device is present. This is done via udev rules that are installed by the package.
I've been maintaining my own packages that can be found in my git repo, for anyone that's interested: http://damjan.softver.org.mk/git/arch-bluetooth/tree/bluez/PKGBUILD -- damjan
