Delayed a few weeks, Unity Smart Scopes (also known as 100 Scopes) has been released for Ubuntu 13.10 Saucy Salamander.
Basicly, Unity Smart Scopes is a smarter Unity Dash, having a lot of lenses, enabling users to search on both the local computer and online, on many websites.
For example, you can search a certain topic on Wikipedia or a music track on Youtube, soundcloud or in the local computer, directly from the Unity Dash, and a preview of the results will be displayed in the Unity Dash, not in the browser. (photo credit)
You can configure which applications are allowed to search on the internet and which search locally.
For now, 100 Scopes has support for this websites/services: Amazon, Audacious, Banshee, Calculator, Chromium bookmarks, Clementine, Colour Lovers, Commands, DevHelp, DeviantArt, Dictionary, DuckDuckGo Related, Facebook, Firefox bookmarks, Flickr , Gallica, GitHub, gmusicbrowser, Google Drive, Google News, Gourmet, Guayadeque, manpages, Ubuntu One Music Store, Ubuntu One Music Search, Musique, OpenClipart, OpenWeatherMap, Picasa, Remote Videos, Rhythmbox, Shotwell, Skimlinks, SoundCloud, texdoc, Tomboy, VirtualBox, Yahoo Finance, Yelp, Zotero, Wikipedia.
To test Unity Smart Scopes, install Ubuntu 13.10 Saucy Salamander. Or install the Unity Smart Scopes on Ubuntu 13.04 Raring Ringtail, but this is highly unstable:
$ sudo add-apt-repository ppa:ubuntu-unity/experimental-certified
$ sudo apt-get update
$ sudo apt-get install ubuntu-unity-experimental-certified
$ sudo apt-get upgrade