A piece of mash-up software by Mozilla Foundation that can be used to paste data from multiple sources together in a Web page or e-mail. The page or e-mail has live content embedded into it, rather than external links. For example, a person could use Ubiquity could contain a Google maps entry showing off a local restaurant for a meeting, and then pasting in reviews from Yelp.com, the user reviews site.
See "Mozilla's Ubquity Mash-up: For The Masses?" on internetnews.com