On April 21, 2008 between 5am and 7am PDT the Try Server will be down for maintenance. For the curious, details of the work are in bug 428308.
The Mozilla2 and Mobile Buildbots will also be down for migration to a new host. Details of this work are in bug 429562.
If there's any reason we can't go ahead with this please e-mail firstname.lastname@example.org.