PlayStation Network maintenance has been scheduled for January 17.
It will run from 4pm GMT this Thursday until 4am on Friday January 18.While users who are signed into PSN before the maintenance begins should remain signed in for the duration of the period, Sony says the following services will be unavailable to all:

  • PlayStation Store
  • Account Management
  • Account Registration
  • Transactions via consoles
  • website

Earlier this week Sony released a new PlayStation Store patch which reportedly improved the speed of load times and reduced stability issues.
It's also running a PlayStation Store sale until January 30, which features discounts on a range of PS3 games and DLC.