Today I added OpenStreetMap maps on aprs.fi. They can be selected using the map type drop-down menu in the top right corner of the map.
OSM support has been on my things-to-do list for a couple years, but since then, it had become much easier to do, and the map coverage of OSM had increased greatly.
The OSM maps have data in many places where there's no Google Maps coverage at all (for example, take a look at Tbilisi, Georgia). Around my home there's more accurate coverage of walking paths in addition to roads.
If you'd like to improve the OSM maps in your area, just go to openstreetmap.org and click on Edit. Please see the wiki for more information on how to get started. If you feel the Google Maps aren't so good in your area, editing OSM maps can become a nice long-lasting hobby project!