MozillaLab's Ubiquity is a promising new window to the world after the age of the search box.
I was strongly impressed with it,
I've done a quickie job.

Gist Ubiquitifier

This is a service for enabling us to publish your Ubiquity commands without any servers which host the HTML file for installing the commands.

USAGE

At first, you make a JavaScript snippet including Ubiquity commands on the Gist.

If the URL of the page is as follows,

http://gist.github.com/7630

the URL of installation page is as follows.

http://ubiquity.s21g.com/7630

You can also specify the name of the command by adding name parameter to the query string, like this.

http://ubiquity.s21g.com/7630?name=s21g-blog-search

Currently the design of the service is very crufty.
I will improve it if there are needs.