Twitter is down and people are somewhat freaking out. This is a really good time to install a microblogging application which supports not only twitter an maybe facebook like the popular tweetdeck. But instead go for one which supports one of the la.conica servers. Identi.ca is the most popular of the lot but support for the open microblogging service is a good idea. If Twitter does go down for long periods, its maybe time to consider switching over.