Actually, on D6, you can. I had a patch in D7, but it got removed by DBTNG.
 
Nancy
 
Injustice anywhere is a threat to justice everywhere. -- Dr. Martin L. King, Jr.


From: "Metzler, David"
Setting

'#default_value' => array('SERVER01','SERVER02')

Is the correct form. 

You cannot as you have done pass the results of a DB_QUERY directly to
the '#default_value'.