Ubuntu Mono fonts patched for the "Powerline" vim plugin: https://github.com/Lokaltog/vim-powerline/
Assuming you already installed and configured vim-powerline:
cd ~/.fonts/ && git clone https://github.com/scotu/ubuntu-mono-powerline.git && cd ~
skn/ubuntu-mono-powerline
Ubuntu Mono fonts patched for the "Powerline" vim plugin: https://github.com/Lokaltog/vim-powerline/ (Just don't trust me leaving it here forever: download, fork whathever)