We reported on this earlier but Nielsen has released its year-end mobile lists: handsets, brands and top sites accessed via mobile devices. It's not entirely clear what the distinction between a "site" and a "brand" is in this set of rankings but below are the charts.

Compare the top Nielsen sites (for 2009) with Opera's top sites for November. There's overlap but the lists are also different, Presumably the Nielsen data capture iPhone, Android and a somewhat broader spectrum of device usage than the Opera data:
And finally, the top handsets for the year: