Given that Eric Schmidt was, only about 2 weeks ago, actively campaigning in favor of The President's stimulus package I find it highly unlikely that the US Justice Department will be going after Google. This could change if Google does something egregious, or there are significant changes in the 2010 mid term elections. However, I don't find it likely.
Also, I think it more likely that companies would pursue action in EU courts rather than US courts, because the EU courts have been more receptive to this type of thing.
Also, I think it more likely that companies would pursue action in EU courts rather than US courts, because the EU courts have been more receptive to this type of thing.