Well, if you have neons, and got the spoiler in matching ilumination, then it would look kinda cool. nice for a show car, if it matches the layout, not good for the street. Cops will say it's illegal, and I doubt it provides any real aerodynamic advantage.
as for what they'll think of next... I dunno, illuminated hoods or canards?
hell, why not make the whole car out of lexan, and line the dang thing with neon tubes?!?
Hey, if you like it, more power to you, but I wouldn't want one on my car, since I already have a real wing on the back to begin with.
However, here's a neat idea: Illuminated smoked-out end caps for the TRD
wing. that'd be kinda cool. liik black when not lit, and illuminate in what ever color matches your setup. probably wouldn't be hard to make a pair... Hmm, the wheels turn...