SCEA has posted a brief update on their blog now as well: blog.us.playstation.com/2011/04/04/update-on-psn-service-outages/
Sr. Director, Corporate Communications & Social Media Patrick Seybold
We’re aware that some of you have been experiencing intermittent service on PSN today. We’re working on finding a solution, and will report back here as soon as it’s resolved.
Thank you for your patience.