Rated 4 out of 5 stars

It works with FF3 with the usual trick: download the quickgooglecal.xpi file (from his website), change .xpi in .zip, unzip 'install.rdf' in an editor and change the maxVersion variable from '2.0.0.*' to '3.0.*'. Don't forget to remove the line with updateURL!! Torrez' own updateURL is insecure according to FF3 so removing it will make FF think updating will occur through addons.mozilla.org. Save the modified file, rezip, change back to .xpi, and install.

This review is for a previous version of the add-on (1.6.5).