[Haskell-cafe] Use of STM in business?

From associate of mine: "I am quite curious if anyone actually uses Haskell (esp STM) successfully in business."

Of course I can anwser the general question about usage of Haskell in business, but I don't know much about STM specifically. Can anyone provide me with any references to where STM has been used in production in a business setting? Thanks, Tom