Geology

Rice Geology Department
Math and Geology
HVO Eruption Update
GSA
AGI
AGU
IAH
Geologist's Lifetime Fieldlist

Fun Fun

Mr Quick Link of the Day
Cruel Link of the Day
Metafilter - Community Weblog
How Stuff Works
PCL Map Collection

Travel

Clark Howard, good for Atlanta
Flights.com, good prices for international flights