For any members wishing to help test the WoW UI Designer, go to your
User CP. On the left hand side of your screen, you will see an option for Group Memberships. In there, you can apply to be added to the WoW UI Designer Private Alpha/Beta testing group.
All decisions on who becomes members of the testing group reside soly with Nulkris, the designer of the program (with the only two {rather obvious} exceptions being that all members of the WoWI staff and any registered Blizzard employees are also automatically included). You must be a registered member of WoWI in order to apply for membership to this testing group. Once the Designer is fully released, this limitation will be lifted. Remember, that all decisions on who are testers resides with Nulkris, as he is the one that has to work with the feedback and bug reports, and that the number of testers he allows will likely increase as the program nears completion and final release.