EXHIBIT 23.1
 
                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
    As independent public accountants, we hereby consent to the incorporation of
our reports included in this Form 10-K into the Company's previously filed
Registration Statement Nos. 333-4802 and 333-44143.
 
                                          /s/ ARTHUR ANDERSEN LLP
 
Seattle, Washington
March 22, 1999