Information from EA forums:

Dear PlayStation®Network users!

Date: 09/03/11

Start: 16:00 GMT (19:00 по московскому времени)

End: 03:00 GMT (06:00 по московскому времени, четверг 10/03/11)


Translated from Russian:
From 16:00 GMT (19:00 Moscow time) untill 03:00 GMT (06:00 Moscoe time, thuesay 10/03/11), there will be main will be the main emergency maintenance PlayStation ® Network. During the technical work may be problems with connecting to the network.

Russian PSN forum Link

Due to this case if teams will have problems with connection or entering PSN services game will be moved to another date by TGMA without teams request!