Straight from The Planet:
The Planet engineers will be performing a maintenance on the dark-fiber equipment which connects the DLLSTX2 data-center (1333 Stemmons) to our backbone pop. This will result in some packet loss and latency jitter for the data-center as redundant paths assume the load. We will endeavor to minimize the impact of this work but due to the nature of the maintenance it is possible for there to be brief interruptions in network reachability. This work will begin at 2:00am CST on August 2nd 2005 and last for 1 hour.