NPR

NPR Radio Expeditions

Weather in Knoxville, TN

Obsessive clock watchers (like me) go here:
The Official US Time

Mozilla Firefox:
Because Bill Gates gets enough business...

The Wildlife Society

International Association for Bear Research and Management

American Society of Mammalogists

And for something completely different:
Squirrel Fishing!
-The sport of champions. Never tried it myself, but everytime I come across it on the web the topic cracks me up...

Jenness Enterprises:
Random point generators and many other usefule ArcView extensions

USGS Alaska Science Center:
Animal Movement, PVA, Spatial Tools extensions

Oregon Department of Forestry GIS:
XTools extension for ArcView

NUGS.NET
Because you can't work in GIS without good tunes...

Environmental Systems Research Institute (ESRI):
Information on ESRI products including ArcGIS, and others

University of Edinburgh GIS Resource List:
A fairly comprehensive list of GIS resources available on the world-wide-web