Can you imagine how many people are trying to tweet that Twitter is down?
I think the current interruption in service may have a positive benefit to Twitter. As the old adage--and the Cinderella song--goes, "you don't know what you've got 'till it's gone." Not to mention the media coverage--a few hours without Twitter was on the national news in Canada. I wonder how many people watching that broadcast started to wonder if they should try Twitter?
There are still plenty of Twitter haters out there, but I expect quite a few "tweeps" will realize that just a few hours without the service is actually quite annoying.