The other nice one is they are getting into mail servers and acting as agents for sales of everything from heavy equipment to home closings. Sending wire instructions to a new account and poof.... gone... when the money is wired.
If the wiring instructions for your transaction are changed midstream, get on the phone with the bank, sales people, whoever to verify with a real person and NEVER trust any email is my suggestion.
My wife works for a real estate attorney. They and their bank will not transfer money without a voice confirmation from the bank/lawyers in charge of the transaction for this very reason.
At least a couple of his clients have already been stung by this scam when they used other attorneys.