Are they a monopoly?
Yet? I mean, technically - what's the level of market share required to be legally declared a monopoly? Google are what, ~80% in the US, >90% in Europe and practically naff all in S.E. Asia?
Now - both Bing and Google provide video search and doing an utterly predictable search for "cute kitten" in each (video) search engine and not surprisingly youtube features heavily on the results pages for both.
Do the same search, on both Google and Bing on the "web" search and you actually get slightly more Google-service results (if you include blogspot, ne blogger) on MSN than you do on Google itself.
Be interesting to see how this pans out because it will determine if, legally speaking, Google are a monopoly and whether they unfairly spaff their own services into their results (as opposed to simply dominating enough of the "popular web" to mean that searching for anything is quite likely to turn up something Google related - however indirectly).
I can kind of see the point when it comes to Google Shopping mind - having that dropped right into the results means I rarely visit sites like Pricerunner any more. There shouldn't be a problem with hitting the "shopping" link at the top of the Google page to get your shopping results that way... but dropping them right into the natural search? Slightly more shaky ground there I feel.