Although few things are predictable about Google, a more educated guess would be a little later in January, probably between the 19th and 30th based on "past behaviors" of intervals between other updates; the last was 19-Oct. For a little fun, make your own prediction http://forums.digitalpoint.com/showthread.php?t=31384
Well i would also say it would be late Jan to Feb Starting.....but lets see..i google outsmarts ur again or not.
Probably whenever the heck Google feels like it I think they sit back thinking not only of new ways to impress and wow the Internet, but also of ways to toy with webmasters ... sounds like a lot of women I know
I am predicting it will be towards the end of Jan and maybe early Feb. The last update was done in Oct. which leaves 3-4 months for the next one to most likely happen. You will notice a BackLink export shortly before the PageRank export from their local servers, so if you see a change in BackLinks, keep an eye out for a PageRank update as well.
Now THAT will tickle me to no end. I remember this past Spring during the "days of gray" when everyone went around screaming the sky was falling because the toolbars went out altogether ... all the while Google was having a big weekend BBQ, drinking and laughing it up no doubt