Microsoft’s announcement today that the consumer version of Vista won’t be ready until January 2007 is one of the more shocking pieces of news to come out of Redmond in recent years.

Vista has been delayed year after year — and now it’s missing the holiday season by one month. Needless to say, PC makers will not be amused; it means that many people will hold off buying a new PC this holiday season, because they won’t want to be stuck with an old OS.

It’ll also mean less revenue for Microsoft, because a new operating system spurs people to buy new PCs, which means more copies of Windows sold.

This one has me scratching my head. The business version will be ready in November, and it’s not supposed to be much different than the consumer version. So why the delay?

Frankly, I don’t get it. So if you have thoughts, post them here. Maybe together we can figure it out.