Since others are suggesting features and such, I figured I'd jump on the bandwagon. Here's my suggestion:
Allow Playstation+ members to communicate with people on their PSN friends list from locations other than the PS3, like from a computer, or a jabber client. I hate the fact that although I can see which of my friends are online from other sources, I have no way to message them.
i think this is a reasonable request. why show which of your friends are online if you have no way to contact them. it would be quite useful for people who are elsewhere, maybe at work even and find a friend playing a certain game. You could message them to see if they'll be on when you get off to play that same game.