At EndUserSharePoint.com, Lee Reed has shared a 4 minute video demonstrating how to add a map set at a fixed location very quickly using only your browser. Quick, easy, simple and open to even the newest SharePoint Site user.
Separately, Sandy Jacalow’s done the same example, but written out with screenshots.
I love easy examples to build off of. If you find these two above interesting, you may want to read Parts 1 and 2 in my SharePoint Maps Series. With a little more work and the help of SharePoint Designer, you can map multiple addresses from a SharePoint Contact List dynamically.