Our hosting provider says:
Date: Saturday, 6/05/2010, 11:59 PM Pacific Time to Sunday, 6/06/2010, 01:30 AM Pacific Time
Digital West will be performing necessary maintenance to our switch farm. This may result in brief losses (10 seconds to 4 minutes) of Internet connectivity between the times listed above, depending on the nature of the service you subscribe to at Digital West. If you are multi-homed, the disruption will be minimal. If you are single-homed, you may notice longer delays.
MetaBrainz Blog 