You know what, there are no updates. Not really. Lots of speculation, and rumors of previous ransom payments five or six years ago, but there is a bit more hype than fact right now. The original story is still out there from the Swiss Radio, but as far as any proof or any other claims (i.e. what bank, who did the transfer, etc) there is pretty much nothing.
So for now, the story is either FUD (Fear, Uncertainty, Doubt) planted by someone who cannot accept that this was actually a military mission, or filed away in the ‘we may never know’ column.
Nice audio interview about the ransom can be found here.