Is Twitter down?
Thursday, November 15, 2007 by Dave Winer.
The feature that's gone is they would hot-up names that appeared after at-signs, so you could click on the name and go the person's page. Let's hope it's just a bit of breakage and not something they did on purpose.
Update: It's pretty clear that Twitter has been down for a couple of hours (as of 6:10PM). It's also clear that it's become an integral part of communication for some of us, I'm one of those people. This outage is giving me ideas for a low-tech decentralized way to do Twitter with RSS and software running on the desktop.
Update: It's back up at 6:45PM Pacific. Jack Dorsey says the @ problem is a bug and will be fixed.