Between single player games, XBox Live, Netflix, Hulu, Dragon Quest 9, the entire Internet not related to Sony and various news channels (maybe the planned third attack on the PSN is going to be carried out by folks who are worried that the pundits won't have any big stories to talk about for a while?), I'm going to have to say no, I'm not suffering from PSN withdrawal.
I might go into withdrawal from a lack of updates on the PSN outage and all of the hilarious commentary and conspiracy theories accompanying any said updates,though. It's become part of the daily routine, after all. If it came back any time soon, people would just go back to taking the service for granted or ignore that it was ever there to begin with.
What will all of the Wii fanatics gloat about if and when the PSN comes back in?!