UPDATE 07/07/2009 11:18 EDT:

All monorail lines now appear to be running. Front cab rides, however, will not be allowed until further notice.

According to several guest and Cast Member reports, the WDW monorails to the Magic Kingdom are currently in operation, but Epcot service remains suspended. Thanks to Kelly H. and john332K for the initial heads up

UPDATE 07/06/2009 10:41 EDT:

Central Florida News 13 has confirmed that testing on the monorail system is currently underway for a possible noon restart. Please prepare for delays and alternate modes of transportation! Thanks to cfnews13 (Twitter) for posting this information.

UPDATE 07/06/2009 10:13 EDT:

I have unconfirmed info that the monorail system is being tested this morning for a possible restart of service today. Please prepare for delays and alternate modes of transportation!

UPDATE 07/06/2009 05:50 EDT:

Central Florida News 13 reports that ALL monorails at WDW remain out of service today, July 6, pending investigation into the accident Sunday morning. Thanks to cfnews13 (Twitter) for the information:

The entire Walt Disney World Monorail System remains shut down Monday as investigators with Disney, Orange County and the Occupational Safety and Health Administration continue to piece together what led to the crash.

Walt Disney World Guests planning to take the monorail Monday, July 6, 2009 are required to take an alternate form of transportation due to an accident on the monorail system early Sunday morning. Extra buses will be available. All parks are scheduled to open on time.

I will update when monorail service returns.

More details on the incident here.

Read Emmett's blog entry / cast member tribute here.