Due to the downtime of PSN over Christmas, Sony have announced that they will be making it up to us in the following ways:
We wanted to show our appreciation for your patience by offering all PlayStation Plus members that had an active membership or free trial on December 25th a membership extension of five days.
In addition, sometime this month we will announce that for a limited time, we will be offering a 10 percent discount code good for a one-time discount off a total cart purchase in the PlayStation Store as a thank you to ALL PSN members.
Not exactly a deal, but more just a heads up!!
The post on the PS Blog is here: http://blog.eu.playstation.com/2015/01/01/holiday-thank-you/