Updates for all distributions are available. New features include kernel 3.1.6, updated Xserver 1.10 for natty/oneiric based distros and new EMGD driver. Note the new EMGD driver and some other updates are already available for older images via the launchpad PPA – installable via apt-get. The new EMGD driver can cause screen corruption on shutdown, but it seems to be slightly quicker for 2d operations than the older driver, and hopefully more stable.
Should there be no major issues with the updates, this will be the last set of updates for Ubuntu Natty, and Linux Mint 11. I still do intend to package up a Linux Mint 12.