Apparently this issue was reported by several sites days ago.
PS Plus Premium users are expressing frustration as a major tier perk -- PS3 game streaming -- has been down for several days at least.
www.playstationlifestyle.net
One of the biggest and best features in the PlayStation Plus offering is not working for a lot of users right now and they aren't happy.
www.gamingbible.com
People working at PlayStation support seem just as confused as we are.
www.thegamer.com
As usual, Sony PR can't be bothered to say a thing
One facebook poster was told they are working on the issue.
edit: not sure why that is saying the facebook post is no longer available. Click on it and it is there. Here's a screenshot either way...