dualboot Android and UbuntTouch

I followed the link [1] of linuxjournal to make my Nexus 7 can boot up Android and Ubuntu Touch without reflash system. Now I can easy show off Ubuntu Touch to my friends and read ebook by Kindle for Android now. I’m interested what solution will beĀ  used for dualboot on Ubuntu Edge or its successor.

 

[1]: http://www.linuxjournal.com/content/multi-booting-nexus-7-tablet?page=0,0