Since there has been some changes to XBMC Hub over the last few months, I thought I'd update those asking where the best repo and Wizard are now, namely Xunity.
You can follow the instructions as before but rather than using the source "xbmchub" you replace it with "http://xfinity.xunitytalk.com"
Our original item on XBMC (for OUYA) was here
If you want some visual help, see the below You Tube.