Yes, I was in on that discussion and came away with the impression that a black and tan glove could go either way.
http://hsbaseballweb.com/eve/forums?a=tpc&s=5316041581&f=4996003481&m=8106040573&r=7316064765#7316064765
I am not familiar with dyes but assume it would involve soaking the glove in some manner or the other or applying a pretty thick coat of liquid to make it take.
Dunno, thats why I asked.