here is some for a 1 year old http://www.fineart.sk/show.php?w=899 heres a head http://www.fineart.sk/show.php?w=1052 http://www.fineart.sk/show.php?w=1053
I remember you talking about this. How far do you push it on W for it to be ignored? As for hassle, I guess it's just a matter of finding or making tools to let you manipulate W as paintable vertex data. Then you also need an exporter that stores W instead of tossing it. And an importer for the engine that reads the W data.