GIS and Mapping Blogs

Mapping Applications

Google Maps Mania
Google Earth Community
Official Google Maps Blog
GIS Education Community hosted by ESRI (ArcGIS, ArcGIS Online, and general GIS topics)
Free and Open Source GIS Ramblings 
 

Maps, Old and New

Strange Maps cartographic curiosities from Frank Jacobs
The Map Room (map observations by Jonathan Crowe)
Modern Cartography by Andy Woodruff (developer with Axis Maps)
Geographicus Antique Map Blog antique maps and the rare map trade
Not a blog, but from ESRI, beautiful Maps We Love

General Observations on Maps and GIS

Map of the Week an interesting map every week
eSpatially New York Perspectives on the Geospatial Community in the Empire State
GIS Realm  Data, software, learning, careers
Very Spatial includes podcasts and a YouTube channel
Shaded Relief assists cartographers with the presentation of shaded relief, 3D panoramas, and related raster art on maps