A recent post on the PlayStation Network forums has confirmed that the online service will be down for planned maintenance between 09:00AM - 14:00PM PST (17:00PM - 22:00PM GMT). During this time you'll still be able to play online and access apps, but the PlayStation Store, PlayStation Home, and Account Management services will be offline.
The post also reveals that the purpose of the maintenance is to enable you to increase the number of portable devices tied to your PSN account. You'll now be able to access purchased content on up to three PlayStation Portables or PlayStation Vitas. This number was originally five, but was reduced to just two in 2011. Will you be taking advantage of this handy update? Are you dashing out to grab two extra Vitas? Get crazy in the comments section below.