Anyone else interested in a Security/Privacy-Focused Phone? [ENDED]

UPDATE (2017-10-11):
So as noted, Purism reached their funding goal. It will be a while till the devices are ready to ship but I was very happy to hear this and hope it opens the door for additional open-hardware phone projects in the future. I would also be great to be able to continue getting OS patches for a long time... I know it has been common practice in the Android world for big companies to stop pushing updates after awhile; really hoping this will take the traditional desktop Linux update approach to phones too.

ORIGINAL:
So I recently backed a crowd-funding project for Purism's Librem 5 privacy-focused phone and I'm waiting to see if it makes it's funding goal. I've been wanting to see open-source hardware and Linux smartphones in particular get even a small foothold in the mobile market for a LONG time now. I don't expect that most people care about that....I even did some GA's recently for my Linux groups but only got a couple responses... But maybe people care about privacy/security more than they care about Linux...

Anyway, I figured in the true SG-fashion, I needed an official poll with some gibs X-D.

L0:
Pang Adventures

L1:
Mainlining
VoidExpanse

L2:
Septerra Core
Konung 3: Ties of the Dynasty

L3:
Hero of the Kingdom II
Two Worlds II: Velvet Edition
Flame in the Flood

EDIT Sept 24:
Emailed the Purism team to request some more info related to some of the points below and they responded pretty quickly (unfortunately I was sleeping in and did not see till just now :-D). To the folks at Purism, if you happen to be reading this, thanks for the fast response and I wish you the best of luck in the crowdfunding so that I too can look forward to a Librem 5 :-)

In response to asking who their security expert is, they responded

Have a look at here, please: puri.sm/about/advisory-board/ (for example, Nicole Færber actively participates in our campaign, have a look at some of her posts in our forums).

With regards to the bulleted list that Movac asked about below, the response was:

All this is planned, we will see how much of this we will manage to implement on time. Our first concern is to make the campaign succeed, after that we will start sourcing and negotiating with our suppliers and finalizing the specs, then we'll start implementing the software. As I understand, much of this is already possible with the current technologies, it's just a matter of adapting it for our specific case.

Finally, they said they will see about getting some more details added on the main Librem 5 page as well.

EDIT Sept 25:
Got some additional details shortly after my last edit. Here's what they said (this was second hand)::

App isolation will happen for sure, secure boot likely not initially, code-signing ties in with secure boot, so "maybe", storage encryption is something I'd like to have (maybe using ext4's built-in encryption feature, but in that case we would not encrypt the OS), centralized management is too vague to say anything about it (what exactly does that mean? there are different levels to it)

I too was somewhat unclear on what layer was being asked about for 'central management' but as I said in my comment below, most Linux distros handle both OS updates and software updates through package management. PureOS is based off of Debian so I would expect it to be somewhat similar to other Debuan based Linux distros like Ubuntu or Linux Mint (in Mint, I usually see an icon by my clock when updates are available and when I click on it I can select which updates to apply and/or change my source servers from where I download updates from. Meaning I can use official Linux Mint servers or if I live far away I can instead select an unofficial source that I trust but which us geographically closer to speed up download times).