Well, the Adsense team blogged about Adsense being down today, but they apparently miscalculated the amount of time it would take to be back up and running.

Tomorrow, from 10am to 2pm, our engineers will be performing routine system maintenance. You know the drill: you won’t be able to log in to your account during these 4 hours, but rest assured that we’ll keep serving ads to your pages and tracking all clicks and impressions in your account.

4 hours for me has become 8. And now the site is back up, but all it does is continuously reload. I can’t even try to log in…

Kind of a bummer…