I assume you're speaking of the maintenance notice for network and database maintenance on Monday night? Monday seems to be the weekly maintenance day. They mentioned a while back that they'd be doing maintenances likely once a week to help clean up the servers (mainly the DF Servers I think) due to heavy volume causing the drives to rapidly fragment. Yoshi P actually detailed this fairly well in that particular post. Upon initially reading that post I had thought it was only going to apply to the JP Datacenter but it seems both centers have been requiring the weekly server TLC. This Monday is 6 hours scheduled though which is longer than normal so maybe they have some other fixes in the works too. The last week or so saw regular Monday maint. Two for Binding Coil Turn 5 in a row. One they didn't really explain. And another scheduled server cleanup got extended due to that rather nasty gil stealing exploit.