Not sure how to read today's reports, but apparently it is two Phoenix aircraft who were impounded plus crew and pax. Not good for those guys at all!
Most detailed web story is in Somalia Report - Piracy which says:
"Now it seems the TFG is red-faced and eager to get the men and the money back on the plane and forget the entire incident. The TFG was expected to release the men and aircraft Wednesday. Phoenix has requested planes and crew to be released, as they had full permission to enter Somali airspace and land at the airport. Meetings were still ongoing Wednesday morning, and the two aircraft - second of which is registered in Seychelles - were still parked on the runway".
As far as Africa night-stops go, that must be about the worst case scenario. Hope it all get resolved, and the guys released to go back to safer flying.... like medivacs out of war zones or something....