A post about geotagging enabling was published on Wednesday on the Blogger in Draft blog. I can see this feature being very useful for genea-blogging. For instance, when Apple is transcribing her letters of Sarah Ann Camfield or Granny Pam is featuring the latest postcard from Belle's Box, they can use the geotagging feature to tag all the locations mentioned in the correspondence. Readers can then find other posts written about the same location.
I'm looking forward to using this feature.
UPDATE 14 Dec 2008: Apple did a great review on this feature. Keep in mind that this is in Beta, which means they are still working out all the kinks and issues and it is a long ways from being perfected. If you use it and have difficulties, be sure to let the Blogger in Draft team know about the problems (nicely, of course). It's collaborative input like this that improves these types of technology.