select chromium, chrome else firefox as default browser

Now that google-chrome requete-alpha build is published by Google [1], I have this
handy script as my default browser "selector":

#!/bin/bash
#
# $HOME/bin/browser.sh
# Author: JuanJo ( juanjosec O gmail o com  )
#
#   if running, try: chromium-browser, google-chrome
#   else:            firefox
#
case "$(ps -oargs= -C chrome)" in
 /usr/lib/chromium-browser*)
   exec /usr/bin/chromium-browser "$@";;
 /opt/google/chrome*)
   exec /opt/google/chrome/chrome "$@";;
esac
exec /usr/bin/firefox "$@"
exit $?

# Point2 me with the output from:
for p in /desktop/gnome/{applications/browser/exec,url-handlers/http{,s}/command}; do
 echo gconftool-2 -s $p -t string "$HOME/bin/browser.sh \"%s\""
done

In a related note, you can see current milestone (LinuxDev [2]) and what to expect for the next one (LinuxBeta[3]).

[1] Danger: Mac and Linux builds available
[2] Chromium LinuxDev milestone
[3] Chromium LinuxBeta milestone