Ubuntu gets AppArmor support
This is bad news. AppArmor is a weak design. IMHO it gives the users a false impression of security, while leaving too much open to bypass security.
But the biggest problem IMHO is that noone at Ubuntu seems to be working on their SELinux support. All I've seen is Ubuntu users breaking their system to a point where they didn't know how to fix it in the attempt to install their SELinux packages. The packages are mostly a 1:1 copy of the Debian packages I guess, but for example their new 'upstart' init-replacement likely isn't capable of actually starting a SELinux enabled system. Oh, and Debian didn't include the relevant package in any 'stable' release, Ubuntu had it in 'universe' since 'warty'. Right now, feisty will include the package, though it reportedly can't be installed.
In the example used in the blog, evince is maybe protected from exploits by bad PDF files, but if you do a cp /usr/bin/evince /tmp and run that copy, all the protection is gone. A symlink might already be sufficient! So AppArmor is heavily relying on the user playing nicely.