The original worked for me, albeit slowly. If it's still slow for people, you can try the Coral CDN mirror http://design.canonical.com.nyud.net/2011/09/ubuntu-monospac...

I really like monospace (mostly) sans-serif fonts, as opposed to the Courier family, for development and terminal work. Another free addition is always welcome, although I'm not sure I like this better than my current font (DejaVu Sans Mono, I think). The raised middle stem in the 'm' looks decidedly weird to me, for example.