Besides showing off the new hubs, multitasking, IE9 and Skydrive support coming later in 2011 (and those were only the announced features, there's evidently a lot more), there was one surprise app that we saw: Groupon (see their site)
For those who haven't been following, Groupon is the biggest "deal" website on the 'net, helping consumers find the best offers and lowest prices for a variety of items and services. They're also known for turning down a $6 billion offer from Google to buy them out. Yes, we said billion.
Anyways, this super service is coming to Windows Phone in an official capacity sometime soon--and it even features a Live Tile with updated deals (similar to that just-as-awesome Slick Deals app available now). All we know is this is great news for WP7 to land yet another major brand.
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Daniel Rubino is the Editor-in-chief of Windows Central. He is also the head reviewer, podcast co-host, and analyst. He has been covering Microsoft since 2007, when this site was called WMExperts (and later Windows Phone Central). His interests include Windows, laptops, next-gen computing, and watches. He has been reviewing laptops since 2015 and is particularly fond of 2-in-1 convertibles, ARM processors, new form factors, and thin-and-light PCs. Before all this tech stuff, he worked on a Ph.D. in linguistics, watched people sleep (for medical purposes!), and ran the projectors at movie theaters because it was fun.