Nobody has said that MAMEUI is no longer developed. Some fans me included are trying to keep it updated and working. In any case both MAMEPlus and MAMEUIFX are strongly dependant from MAMEUI source... so if MAMEUI dies, it's probably that they will quit too. I'm the developer of MAMEUIFX so you can trust my words. However, yes, they shares the same features of official MAMEUI with some nice changes. For more info about FX: http://mame32fx.altervista.org/features.htm