I typically use Dash to search for programs and, less often, files. The default behaviour of Unity Dash is to return thousands of results among not only your documents, but also online shops, search engines, social networks, music and so on.
Apparently, Ubuntu is getting rid of system tray in Unity… this affect all the applications (e.g. Skype) which have hardcoded system tray features. The old trick of whitelisting them does not work anymore, since the whole system tray is missing.