Recently I interviewed Sheldon Gilbert, CEO of Proclivity Systems, regarding the company's e-mail marketing engine, called Proclivity Mail.

Fast Company magazine also published a story about Gilbert and Proclivity in its May 2008 innovation column.

It had been debatable whether customers would go for the targeted spam the software sends to customers, but Barneys says people are responding to the predictive e-mails in droves, according to the piece.