I really liked the ideas in Paladin, and I really like Risus....so I did the next (natural to me anyway) thing and converted it to Risus. It hasn't been fully tested yet, but the entire thing is up on the Risusiverse wiki (http://risusiverse.wetpaint.com/) so anyone interested can contriburte (in fact, I'm hoping other Paladin fans will contribute). You can check out the page: Paladin - Risusviverse (http://risusiverse.wetpaint.com/page/Paladin). Enjoy!
I think there should a few more rules for Attribute selection. You need to define 'Dark' Attributes/Cliches from 'Light' Attributes/Cliches if you're going to leave the 'Do you get a Mark for your transgressions' rule the way it is. It might also help to require a descriptor in your Paladin cliche. It would be your main shtick, like Quick Paladin or Patient Paladin or Bad Motherfucker Paladin. I am tempted to edit this in, but I'm not super-familiar with Risus.
This reminds me that I'm kind of surprised no one's done Paladin in PDQ. The mechanics are oddly similar.
George