May be a hoax, maybe not, Jamie.
Alan Spievack, Harvard professor, cellular regeneration pioneer and the creator of the dust, died in March from bladder cancer. He's not around to defend his creation, and his brother Lee (the man whose finger "regrew") claims that his big brother was a genius. It's kinda sad, because I think Lee tried to get more notice for his dying brother's work, and it may have backfired.
Here's Spievack's obit....
http://www.boston.com/bostonglobe/obitu ... ievackart/