Microsoft is widely expected to announce tomorrow that Windows Vista has been released to manufacturing, according to multiple online sources. The company has officially scheduled a conference call with Microsoft executive Jim Allchin for 11AM Pacific which the company has linked directly to the future operating system. The move is timed to closely precede the official November 23rd availability of Vista for businesses and other large-volume customers. Vista has been plagued both by a mid-development rewrite and frequent delays, its most recent being a last-minute delay to correct key remaining flaws. Widescale availability for the general public is expected at the end of January.