there is some speculation on bitcointalk, i can't think of specific threads, along with the silkroad forum.
some have speculated BS&T is related.
BS&T?
Bitcoin Savings and Trust, Pirate40 is running it.
earn upto 7% per week.
others are speculating its a ponzi.
it can't be kept up for ever but its good while it lasts.
from what pirate has said, he's doing off the books exchanges with large cash investors.