Smartphones, tablets dominate first day of Mobile World Congress; Microsoft's Ballmer defends Nokia-WP7 deal;

> Smartphones, tablets dominate first day of Mobile World Congress.

> Microsoft's Ballmer defends Nokia-WP7 deal.

> HP unveils webOS TouchPad tablet, Pre3 and Veer smartphones.

> Qualcomm co-stars with Creative Artists Agency on mobile apps venture.

> Foursquare expands to five new languages.

And finally... Optimus Prime gets a parking ticket.

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