For the past year, foursquare has placed a serious emphasis on location-based business discovery. The geo/social app/network has put considerable resources into building up its "Explore" feature which recommends nearby businesses to users.
As of today, the Explore feature is now available as a widget for Android device home pages and serves as a shortcut to the Explore tab in your installed foursquare app.
foursquare has posted on their blog, the steps necessary to install the widget. Explore is a pretty cool feature. If you have an Android device, I recommend you try it out.