Well, I'm shouting this one off the rooftops -- starting today I'm publishing SIGMA, a brand new STREET universe story on Twitter. It will feature multiple story updates a day and is interactive; the main character will respond to direct messages and @replies. It's something you should be paying attention to!
You can find SIGMA here: https://twitter.com/sigmastory
It's set decades before the events in Empathy, none of the familiar STREET characters have been born yet, but the past has been known to echo into the future in some ways . . .
In any case, it's cool and you need to follow it.