Geo APIs are popular in today's mobile, ever-connected world. It's hard to find an oft-used app without mapping functionality of some sort. While the likes of Google Maps and other services have popular APIs, there is a visible lack of standardization in geocoding that the OGC seeks to remedy.
If you enjoy creating fun, interactive maps, you'll get lost in the latest functionality from UMapper (our UMapper mashup profile). With it, you can include any image--even one that isn't a map--in its Flash viewer.
The limitation so far has been that users and developers usually have to wait for the big players like Google, Yahoo and Bing to add the relevant information to their maps.
CloudMade has conveniently side stepped this issue by allowing its maps to be collaboratively edited, making it a kind of “Wikipedia for maps”. The results have been quite impressive, as TechCrunch reports.