As of the fall of 2010, it appeared that the flight operations end of AirServ had pretty much wound down - they were operating one Caravan in Goma under sort of an ad-hoc wet-lease arrangement with a Goma based Congolese operator - I was not aware of any other AirServ aircraft that were being operated in Africa at that time.
Their MRO in Entebbe, which is a different business entirely, seemed to be carrying on as normal, serving a number of external clients in various ways (providing hangar space, offices, etc.).
I don't have any information that is more current than fall of 2010.