I made a slight addition to the kottke.org archives page the other day: a StoryMap from outside.in's GeoToolkit.
[I removed the map temporarily because it wasn't loading.]
To construct the map, outside.in scrapes kottke.org's RSS feed, looks for names of specific places, and plots the related blog entries on a map. There's not a lot of local content on kottke.org but the results are still pretty good; it works a lot better on a local site like Gothamist. [Disclosure: I am an advisor to outside.in.]