I know Iron (and Comodo Dragon, CoolNovo and the original Chromium). I'm also aware about the points mentioned here
although the ones related to functionality (adblocking, new tab page, etc.) don't really matter for me as I use extensions which replace the default functions.
As for privacy, I'm not really sure whether I should be concerned about Chrome's tracking that much. Google probably gets much more information about me when I use its search engine anyway Edit
: Just to clarify: my main browser is Firefox. I use Chrome as a secondary (alternative) browser. Firefox is so much more customisable and there are still more useful extensions for it... but Chrome is just fast! and offers synchronisation of not only basic user data but also extensions (Firefox doesn't).
Edited by tomasz86, 25 November 2012 - 02:56 AM.