First, I should state that no active developer currently has had access to an mrobe500, since before the 3.15 release. And the information in this thread is ... confusing, to say the least.
In the interest of trying to sort this issue out, some basic questions:
0) Have you tried a daily build from within the last month? If not, do so.
1) What _exactly_ is the problem with the current daily builds? Failure to boot, hang in the UI (where? doing what?), or something else? The more specific, you can be, the better.
2) Has the device been modded in any way (eg SSD storage), and if so, what?
3) Did the 3.15 release work properly? If no, did the 3.14 release work properly?