Google has been taken by surprise at how many people use their services on the iPhone:

Google on Wednesday said it had seen 50 times more searches on Apple's iPhone than any other mobile handset, adding weight to the group’s confidence at being able to generate significant revenues from the mobile internet.

"We thought it was a mistake and made our engineers check the logs again," Vic Gundotra, head of Google's mobile operations told the Financial Times at the Mobile World Congress in Barcelona.

Whenever I'm out and about and I need to look up some random factoid, I frequently use my iPhone Google app.