The community remains stranded a device successful, especially if it has been so sold as the Nexus 7 of first generation (2012) that already has been out plans update of Google Android m, the latest version of the operating system that just be presented at Google I/o 2015.
The Developer Preview of Android M has already reached its first devices – the Nexus 5, 6, 9, and exclusive-Player, but If you have a Nexus 7 of 2012, you’re in luck, as the developer community has just published the first ROM cover based on Android M Developer Preview.
As you already adored, has been in xda-developers where advances with this port, which soon will also reach the forgotten 4 Nexus and Nexus 10 have been published.
The ROM is functional but not usable in daily use, because obviously in a first version of the port there are many elements that do not work, as the essential WiFi connectivity for example. That Yes, it is an interesting step for developers, and intrepid users who surely will contribute each in its own way to grow project.
Since the source link you can access the download and information on your installation, which must be done with the tool MultiROM on a secondary partition. Here you have some screenshots posted on the Forum: