You might also find these this G+ communities interesting:
- Chromium OS -?Community of hackers, testers, developers, or those using other builds of Chromium OS.
- Chrome OS -?chrome, chromebook, chromebooks, Samsung, Acer, android, google, Pixel, HP Pavilion, Lenovo, chromebox, chrome releases, chromecast
- Chromebook Users -?Tips and Hints from REAL users
- Crouton Users -?crouton: Chromium OS Ubuntu Chroot Environment