ExIMF changes for the book

I’m facing a conundrum. The book must be finished by 12/31. Although I have early access to the Exchange Intelligent Message Filter, if I write about it now it’s likely to change before the book hits the shelf; this is obviously bad. What I’ve decided to do is mention it in the book, limiting myself to talking about what’s already been publicly disclosed by MS. Then I’ll write some material that describes it in more detail. That material will appear here, either as a bonus chapter for folks who buy the 2003 book or as a separate e-book. That way I can provide fresh material without getting in trouble with the PMs for the IMF or slipping the book any further.