The case is now closed by the FIA. They issued a statement that read "Following the BAR Honda press release of May 11, the FIA regards the San Marino Grand Prix incident as closed. BAR Honda are no longer under investigation and the FIA wish them every success in the remaining 13 rounds of the FIA Formula One World Championship."
The BAR Honda release the FIA are referring to is when BAR Honda accepted the penalty and considered it fair.
Full statement