Yesterday Yelp released an update to their iPhone application. I probably wouldn't have even noticed, except that I visited the app store to download the new Facebook application that everyone was in an uproar about, and it told me there was a new version. So, I downloaded it, checked the notes to see if they had added the ability to post reviews direct from the app (still no? Come on Yelp!) then closed the app. I had pretty much forgotten about it until I saw a tweet a few hours later on twitter from another local Portland chap, Marshall Kirkpatrick, of ReadWriteWeb titled "Yelp brings first US augmented reality to iPhone". That caught my attention right quick! I clicked on the link, and couldn't believe what I was reading. Apparently there's a hidden feature in the new Yelp app that allows people to unlock an Augmented Reality function. What, what, what? more...