The Mac version of Google's Chrome browser, although not yet officially released by Google, is getting nightly builds in the form of Chromium. As Chromium adds more features that are already available in the Windows version of the Chrome, it makes that it would also get its own portable version. Like Portable Google Chrome for Windows, which we've reported on in the past, Portable Google Chrome for Mac is a version of the browser that you can load up from a USB key.
The portable version of Chromium loads from a ChromeLoader app that makes sure your settings save on your portable media, so you can take them with you anywhere. It's a good time to try Chromium, since important features like Flash, popup blocking and full screen mode have been implemented over the past couple of weeks. The developer's blog is in German, so you may find it helpful to try this version, via Google Translate.