The MilKDrop engine is something I want to see included. SADly MilKDrop and all it clones (that emulate it's behaviour - Xplugin, TwistedPixel) are all Direct X ones.
I would like to have a bash myself but I don't think I would have the time/ability at this stage to complete a project like this.
It would be a great module thoug and I could add like 1,000 of my scenes for MilKDrop for R4.
;)