I have 6,000 US locations loaded. What I want to do now is to determine for each one of those locations, how many other locations are within X miles of the one location. So, for Point 1, there are 6 Points within X miles. For Point 2, there are 10 Points within X miles. Etc.

Any idea how I might pull a feat like this off?

Do you need driving distance or is the straight line distance OK? It would be a lot faster and easier to do the straight line distance..

Eric