From what I remember, Jonathan Greene reported hearing it from someone at the Night With S60 event in NYC about a month ago, saying in about a month. So really, it should be any day now.
Honestly, I think it'll be a .sis file. Think about it. Develop 1 .sis file or redo firmwares for how many different devices? Good riddance, I say, there's 2 more icons banished to the "Crap" folder...