what i have heard, when you adopt or save a black kitten or cat it means good luck, it means whenever a black cat crosses your path its good luck. so yes, adopt a black cat :D
Love Batman!!!!...there was an article in the Vancouver Sun (newspaper) about how people are suspicious of adopting black cats. Where I come from in the UK it was always very lucky to cross the path of a black cat...I think they are super...so go out an adopt a black cat today...and love them to bits!!!!!