Actually, from what I understand of these things, you have the 'indexed web' and then there those sites/locations that for whatever reason remain unindexed.
Until just recently most of the big guys proudly displayed their index size right on their main pages. This went on for several years, Yahoo would say they had x billion, then google would say they had a few billion more, the MSN came on and said they had another number - bigger yet. Then pretty much once everybody had their turn they started all over again and raised it up to some other obscene figure and the circle started yet again.
Problem being, after a while it all became prosaic to even the few people that cared to begin with. Index size braggadocio became such a trite and meaningless stat in most circles that it has completely fallen off the main pages of all the big guys.
While it wasn't the necesarily the biggest detente of the century it did effectively eliminate the arguments of size as a quality indicator. It probably wouldn't be too far off base to say that index size quit being impressive to most way back in the days when people still used HotBot and Lycos to search.
Most people would rather have fewer, better results than having to sift through massive quantities of useless results. As such the index size arms race went out with a whimper.
I realize none of that answers your question but it is my best explaination for why you may not be seeing those kinds of numbers floating around as much any more. Last I remember, Yahoo was claiming to have indexed something like 19 billion pages, don't really remember if Google put up a bigger number after that though.
Here is a great article at SearchEngineWatch that gives you a pretty good idea of the whole 'size of the web' issue.
Here here and
here are some WebProNews articles on the subject.
Hope that helped a little.
How many sites in the Internet
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