Context:
Zena (http://zenadmin.org) is arriving at maturity after more then 5 years of development. It's a very powerful MIT licensed Ruby on Rails CMS with lots of advanced features to create websites and applications.
I am the author of Zena and related gems (RubyLess, Property, Versions, QueryBuilder, etc).
You:
If you have some good UI skills and feel like creating some "Zen" design, you could give this project a huge boost.
Offer:
I most probably do not have enough money to pay for the type of quality design that this project deserves (I do not earn money with Zena) but I would be glad to discuss any arrangement to give back with my own skills and time.