Thanks to the help of the Ubuntu MATE team and their tool Ubuntu Pi Flavor Maker, we are now able to provide community-supported images of Lubuntu for the armv7-equipped Raspberry Pi 2. Note that there is no current support for earlier Pi models, since they use the armv6 chip, though Debian does support them.
Here's the Pi running LXQt in Xenial:
Testing will be exploratory and non-formal. If you see a bug, please report it to the development mailing list.
Keep checking back here for more news!