Hello, 2 weeks ago I bought mini 9 with the intention to install on it Mac OS X. So I did it and I was impressed from the Graphical interface and the ease of work (it takes some time for realizing this). But on the other side I support the open source projects and for the last may be 10 years I am using Linux and FreeBSD. And it was interesting for me is it possible to have this great interface on a linux box. I made some researches and here is the result.
This article is for interpid, but it can be applied on hardy - the version of Ubuntu installed on minis. I put it on my Inspiron 6400 with jaunty - 9.04 and it is same as the MAC OS X. So you can give it a chanse
Turn Your Ubuntu Intrepid Into Mac OSX Leopard – Make Tech Easier
Wish you luck