Ubuntu is a sans-serif font. It goes well with Lato, Merriweather and Journal. If you're thinking about using Ubuntu then try Give 15px a shot for content.
People commonly tag it as modern, blog, music, clean, sans serif, uppercase, design, portfolio, curved and technical. You can get it from Font Squirrel, Google Web Fonts and Typekit.
Examples Ubuntu on its own
In action 5 Ubuntu samples
