Mary Jo Foley reports It’s the End of the Line for Microsoft’s Services for Unix Product:
After folding some of the SFU features into Windows Server 2003 R2, Microsoft is planning to discontinue support for SFU as a standalone product.
SFU isn’t that well known despite being free and winning a best of show at LinuxWorld in 2003. As it currently exists, SFU is a combination of an earlier SFU offering and the Interix product line Microsoft acquired when they purchased Softway Systems in 1999. It was always an accomodation to enterprise customers who needed some Unix interoperability.