My feedback after installation of android 4.4 R1 on a Compaq mini 110.
Installation made on EXT3 formated 250 GB hard drive (recognized as the sd card for android , can make a lot of installation :-) ).
No problem for installation , only made System read only (was a mistake , or not).
Keyboard is ok (French azerty ok) , Wifi broadcom is recognized and working as well the ethernet port.
My HP's bluetooth dongle is recognized and working.
Problem (resolved) : 
Zoom in /out : resolved with assistive zoom application (work nice on maps and others)
Rotation : resolved by fixing in Landscape mode with ultimate rotation control application 
sound was very low , Google search gave me an answer :
ALT +  F1  and type 
   alsa_amixer   sset Master 127
   alsa_amixer   sset Headphone 127
   alsa_amixer   sset Speaker 127 
and then ALT + F7
So i installed Smanager (script manager) and put this line in a script (run at boot , as root) -> All is OK now
Sleeping Mode : after 30 seconds , screen goes On 
This was solved with another script at boot 
echo disabled >sys/devices/pnp0/00:02/power/wakeup        (maybe 00:02 to be change , search for wakeup)
Some problems not solved
No battery information (any idea?)  
Hangout crash in audio or video call.
I tried to connect my Bluetooth GPs ans it's working fine .
I use Nova Launcher
Cannot take screenshot .