Geotagging on the Mac

One of the big new features of iPhoto announced in iLife 09 is support for geotagging. During the keynote and in the demonstration video posted on the website, Apple use a Nikon P6000 which rather handily has a GPS built in. But what about the rest of us users who have cameras without GPS or those that would like to geotag their photos but don't want to use iPhoto?Well we have a couple of options.