Surprise! The popular iPhone app Yelp has a secret feature that overlays nearby points of interest on live video of your surroundings. This augmented reality feature is available in Yelp version 3.0.0 on iPhone 3GS.

To turn on the feature, called Monocle, make sure "Location Services" are ON. Launch Yelp and select the "Nearby" screen from the bottom menu. Now gently twist or shake the iPhone a few times until the dialog box stating "The Monocle is activated" appears.

Apparently if you have an iPhone 3GS and you're looking for the nearest burger in Paris you're in luck. Presselite has released their 99 cent iPhone application, Metro Paris Subway.

It allows iPhone users to view many points of interest, including metro and bus stations, superimposed over live video of current surroundings. Just a month ago we explored a video of the prototype NYC version of a similar augmented reality application.

Soon iPhone owners with Sirius XM subscriptions will be able to drop an extra $120 to listen to Taylor Swift in their cars. Sirius XM has finally announced an all-in-one dock that will convert your iPhone or iPod Touch into the ultimate mobile satellite radio listening machine.

The adapter hardware plugs into the automobile's 12V DC power jack (previously known as the "cigarette lighter" if you're older than Taylor). Snap in your iPhone and fire up the free app and you're ready to take advantage of your existing satellite radio subscription.

Check out this alleged photo of the forthcoming Apple touch pad / HD media tablet / extra-large iPod Touch / netbook killer / iPAD in-the-works. Nice touch making it look like it's booting Leopard for the first time.

There are sure to be many more "leaked photos" churned out by zealous Photoshoppers. Maybe they'll have better mobile phones. Word on the street is that the upcoming Apple event on September 9th will NOT mention anything about a tablet device.

Vonage is looking for a boost from iPhone users amid sagging sales of its Voice over Internet Protocol (VoIP) service. The company has submitted an iPhone application to Apple for approval.

The first version Apple reviewed came back due to a technical issue involving an icon label. The app was resubmitted by Vonage after correcting the problem and is currently under review.