Valleywag reports that Salon.com, which has an office in San Francisco, has laid off six employees, or 20 percent of its staff.

The SF Business Times reports that Salon’s premium subscriptions have been dropping from a high of approximately 89,100 on Dec. 31, 2004, to about 21,700 as of June 30, and the business guesses that those memberships will continue to decline to about 16,000 by March 31, 2010.

According to Valleywag, those let go were:

Jeanne Carstensen, managing editor
Kevin Berger, features editor
Katharine Mieszkowski, senior writer
Joy Press, culture editor
Caitlin Shamberg, multimedia editor
Julie Coburn, photo editor

BTW, Salon is still hiring. Openings include “art director/senior designer” and “Senior Web engineer.” And they’re looking for interns.