I help sell a product that is very useful for Stepmania. Its a USB adapter somewhat comparable to a JPAC that allows you to plug and play your Dance Revolution arcade machine however it allows for lights control through USB when running Stepmania 3.9 plus redux or oITG beta 2. Please look at this link for youtube videos, purchase information, etc.
I prefer to sell from bemanistyle if people are intersted in purchasing. They will need to contact me there. Thanks!