MapHook, a social discovery app that allows users to find, organize, and share interesting activities (hooks) by location, has upgraded in a big way.

The update includes the new “Liquid Social Discovery” user interface, better search filtering, integration with Foursquare, Twitter, Yahoo, and MapHook’s “CultureHook” project, and a “HookStream” dashboard featuring streaming Hooks for faster viewing of information. Users can now like Hooks and share them via social networks and email. Also, there is now an offline mode where users can create Hooks when they are not near WiFi to save on data.

You can find Maphook on the App Store for free.