According to a study by PayScale, and published in the July/August 2009 issue of Inc. Magazine, Database Administrators make more than Web Developers, IT Managers, Programmer Analysts, and Software Developers (in this order of ranking).
In addition, the study shows that the more experience the DBA has, the more he or she makes. For example, a DBA with 10 years experience makes about 72% more than a DBA with 1 years experience.