There was an article today in NYT which was only mildly interesting - what i found on a related subject that captured my attention more though was the threadlinked post by Fred Wilson:

According to Comscore, one of my portfolio companies, Google's US market share is 38% and Yahoo! is 35%. So between the two, they own 73% of the US market. Worldwide, Google is stronger, with 47% to Yahoo!'s 27%, but even worldwide, the two of them capture almost 75% of the market.

and...

It's interesting to me because I use Yahoo! (my.yahoo.com to be specific) as my start page, but I use Google as the search field in Firefox, where I do most of my searching. And I use Google's desktop search which further drives me toward Google when I do a search. But for local search, maps, and yellow pages, I always go to Yahoo! because they have by far the best service for that kind of search.

Of course that's all well and good, Yahoo is a more rounded service by far, but what when, that's when, not if, Google put all these Beta's and aquisitions they've been hoarding into play? Maybe under my.google.com - the whole scene could shift dramatically at that point...