I just installed oh-my-zsh and played around. I had created a minimal theme to suite my needs, called 'serenity'. It will show the minimal information about the system (machine and actual dir) and has git integration.
I hope you will find it useful.
P.D: Sorry for my bad english.
P.D2: And this is my first pull-request, hooray!
Added serenity theme
Merge remote-tracking branch 'upstream/master'