There's a new cafe in the works at Sixth Avenue between 14th & 15th, next door to the Greek restaurant Athena.  The owners are planning to open by the end of the week. They will be serving coffee, pastries, sandwiches & the like, and I was told it will be called O.S. There are plenty of cafes around here, but not so many on Sixth, though I guess this could be competition for nearby Muse.

Update: 11/10  O.S. opened today - a bright, cleanly-designed cafe, making good use of a small space.  Looks like a good fit here.