Here is an 8-minute news story about the incident, in Norwegian but with English subtitles (the meteorites first appears around the 1:50 mark):
In an English-language story on the Norwegian news site NRK.com, the experts weigh in:
Although Helstrup is still not completely convinced that it was indeed a meteorite that flew past him, the experts are in no doubt.
"It can't be anything else. The shape is typical of meteorites – a fresh fracture surface on one side, while the other side is rounded," said geologist Hans Amundsen.
He explained that the meteorite had been part of a larger stone that had exploded perhaps 20 kilometres above Helstrup.
Amundsen thinks he can make out coloured patches in the stone, and believes that in that case it may be a breccia – a common type of meteorite rock.
UPDATE: Turns out this wasn't a meteorite, but just a plain ol' rock. It was apparently caught up in the skydiver's parachute, and fell out when the chute opened.