Foursquare has released an update to its location-based social networking app for the iPhone and iPod touch adding support for adding comments and photos. Foursquare 2.2 now allows users to post comments in response to friends’ check-ins to facilitate meeting up and discussing venues. The new version also adds support for posting photos from the camera or photo library for check-ins and when posting tips for a location. Photos and comments can also be viewed from the foursquare.com web site in the users’ history page. Foursquare is available from the App Store as a free download.