> Anyone have any insights into this? From the outside it looks like Mozilla is parting ways with Google because of Chrome.

Looks more like Mozilla is parting ways with Google because of money -- whether Yahoo! offering more than Google has in the past or Google offering less.

(Though, looking at historical usage share measures, there's a good argument that if Google is offering less, its likely because Chrome eclipsing Firefox -- and by some measures IE -- has reduced the value of default search placement in Firefox.)