Figured out that it does in fact work. All you have to do is go to
goo.gl/eIKCN
1 Make sure that you make a back up with your rom on the custom recovery
2 Download the
http://cdimage.ubuntu.com/ubuntu-to...c-demo/quantal-preinstalled-armel+grouper.zip and
http://cdimage.ubuntu.com/ubuntu-to...c-demo/quantal-preinstalled-phablet-armhf.zip and copy them to your computer, then with your nexus 7 plugged in go ahead and drag them to your nexus 7
3 reboot to recovery, again make sure that you made a back up of your current rom, go wipe the data and the cache (factory reset)
4 go to install and install both of the zips that you downloaded, after that just reboot the system and it will go straight into the ubuntu touch preview
5 if you want to go back to your old rom power down then hold the volume down and arrow keys until your tablet boots into bootloader mode, select recovery, go to restore and restore your old rom