hit the App Store during Expo. The latest version of the social networking app from adds Twitter and Facebook integration and the ability to relocate your profile to anywhere in the world in order to find other WhosHere users nearby.

WhosHere is a friend-finding app with around 1 million users in 150 countries. Users can send free text messages and make Wi-Fi phone calls via WhosHere; since the app handles all those interactions, there's no need to ever hand out your phone number, IM address, or any other personal information.

The new travel feature is a $2 in-app purchase for users of the free WhosHere. By moving their profile to a new location, users can connect with other WhosHere members, getting advice on what to visit and where to eat.

Speaking of free messaging services, a new one will be arriving at the App Store in a matter of weeks. Representatives from were on the show floor at Expo to preview their upcoming mobile-to-mobile messenger application built for the iPhone, iPod touch, and BlackBerry.