You may want to check with your visa service on this tidbit I got via e-mail today.

Effective August 1st, 2007, the Chinese Consulate will be increasing their China Visa Fees by $50 per visa for U.S. Passport Holders. Passegers traveling to China within a 90 day period (from date of visa application) who wish to avoid this increase may obtain their visas on or before July 31, 2007

Cheers (?), Anne