$this->bbcode_second_pass_quote('relghuar', 'W')ell, I've managed to get arch running, mostly without problems. It's using original chromeos kernel, modules and firmware, everything else comes from
http://us.mirror.archlinuxarm.org/os/od ... idx.img.gz (armv7h architecture). I'm booting it from 16GB usb stick.
Experience so far is not that bad:
X windows is running with xfce4 on an fbdev driver with no acceleration (I'm working to get xf86-video-armsoc from git.chromium.org built on latest X, though I'm not sure if it helps performace that much
http://www.youtube.com/watch?v=Vzmckw3fAQo).
Wifi connection is stable (NetworkManager with nm-applet).
Touchpad more or less working, not as smooth as in chrome, but after a little acceleration/sensitivity tweaking it's pretty comfortable, double-touch scrolling works.
Keyboard without home/end/pgup/pgdn was a p.i.t.a., I had to use xmodmap to remap AltGr-arrows and backspace.
Single-button touchpad is even worse, haven't yet figured out how to map anything to right-click (two-fingers-click not working, mouseemu doesn't pass the events correctly to virtual device, I have yet to test custom xorg.conf.d/50-touchpad.conf settings from the link above).
I fought with this setting up the touchscreen on my Overo, see the install page, advanced, item 6.
Obviously, your calibration will be different. The parts you're interested in are the EmulateThirdButton lines. It took me quite a while to sort out and I lost the original link, but emulate third button also handles situations where you need to emulate the second button.
Hope that helps a bit. I can occasionally be found on IRC if you need more help.