iOS 5.1 landed earlier this month without much fanfare, but there's one nice little nugget that we hadn't noticed before; when searching for restaurants through Siri, tapping on listings will launch right into Yelp. Of course, the voice-activated assistant was already pulling results from Siri's database, but didn't do much beyond that. Now when you type on business results, you go into the Yelp page, where you can see detailed reviews, pictures of the restaurant, hours, contact information, and get directions. There's even a quick link to reserve a spot through OpenTable.
It's a small upgrade, but a pretty helpful one. iOS 5.1 has quite a few other tweaks - be sure to check out our walkthrough for the full tour.