(1) Current Kernel is 4.8RC4 Mainline supporting the following:-
Wireless, External SD-Card, Internal MMC, SPI/I2C
(2) Working-in-progress (streamline):-
SPI/DMA, PWM and intel_idle
(3) Not-yet-started/Unknown:-
(4) No Audio, no BT, no PSH - Platform Service Hub aka Quark MCU, SST - Smart Sound Technology for now.
(5) Mainline with device-tree will officially begin from 4.9
(6) Login as root/password
Please edit /etc/network/interfaces and include your ssid and password within double quotes.
wpa-ssid "ssid"
wpa-psk "password"
Ap mode is also supported for Ubuntu
(7) Credits to Andy Shevchenko for all the current and future work. https://github.com/andy-shev/linux/