Well I've thought about doing the mini-head/tail lights mod...I know I can do it, but it's a lot easier to do in my head than in reality.
Drill holes in mini-headlights and mini-tails, wire up LEDs behind the holes to the headlight relay so when your lights are on the mini-Sol's are too...but that's a lot of physical effort to put into such a tiny thing, that like you said, only fellow Sol drivers would care about.
I'll prolly end up doing it, since I am a total sucker for little light-up dealies like that.