Someone asked me about what height a work surface used while standard should be. The obvious first place to look is "The Measure of Man and Woman: Human Factors in Design" by Alvin R . Tilley of Henry Dreyfuss Associates (Wiley, 2001 avialable in the University of Canberra Library). This gives recommended dimensions for all sort of work surfaces (originally for the US military but later updated). But I could not find a recommended height for a standing desk there, or an where else.
With some searching on-line I found the term for a desk used when standing is a "stand-up" or standing desk. Amazon.com sell "standing desks".
There is the wonderfully titled article "Become a Stand-Up Guy: The History, Benefits, and Use of Standing Desks" by on July 5, 2011. The company Standup Desks. offers Measuring Tips.