Chris from Highly Allochtonous posted a list of all the Geoblogs on his AllGeo feed. It is 45 Geoblogs! Wow! I indeed discovered four Geo-related blogs I did not know about, yet. Namely: Dave's landslide blog, Geomorphic Hazards, Head in a Cloud and the Sauropod Vertebra Picture of the Week.
If you are new to the Geoblogosphere you better check out Chris list and you will get a very thorough first impression!