For those who haven't heard of Mozilla's Ubiquity it is an experimental plugin for Firefox that provides a command line interface for executing commands to control the browser.
Being a big fan of command-line commands, I've decided to jump on the Ubiquity bandwagon and create a command for bookmarking a page with Google Bookmarks (which I am a fan of). This is based on the bookmarklet provided by Google and I got some hints from Ryan Sonnek's delicious Ubiquity command.
Click here to go to subscription page for this command
Click here to download the command
Usage:
Type "bk" followed by a comma-separated list of tags (Google calls them "labels") you want to apply to the bookmark. It will bring up the popup that the bookmarklet normally brings up so that you can make additional changes and submit it.
Known issues:
Also, see my Ubiquity command page for a full list of commands I have available.