This is an interesting prototype for those using Firefox. Ubiquity is a Firefox extension that basically adds a command interface to any web page that allows you to enter natural language like instructions to mash-up various web services. If you’re familiar with ActiveWords or Quicksilver, you’ve got a jump on understanding what they are after here. The example everyone is touting in talking about this, is that you can insert a map in an email without leaving the email that you are working on, but you can imagine many other uses for this as well. You call up Ubiquity with a key combination. Keep in mind this is an early protoype but it is available for download.