Twitter hacked? (updated, short answer: "no")

Not sure what's going on over at Twitter, but when I attempt to access the site, each new refresh logs me in as some other seemingly random user, generates a seemingly random series of users I'm not "following," and the top post shown says something about a tiny penis, and following a hack, no matter how many refreshes I hit. (shrugs). Screengrab. Update: oh, nevermind. But Scott Beale wins in "best coverage of downtime in 100 chars or less." Valleywag explains.