Ubiquity 0.1.6 is available now.  Although this is a bug-fix version, it offers a useful command called “create-new-search-command“.  To use it is quite simple:
1. Click on the search box you want to create a search command with;
2. Evoke Ubiquity and input “create-new-search-command“;
3. Hit Enter key and done.  And a notice will show you the name for the command you just create.