It'll be interesting to find out whether Alonso knew anything at all about this - I would hope not, but who knows. And also what the authorities will throw at Piquet for his actions: this is like a boxer taking a dive, but with the added bonus that it puts everyone else on the track at potential risk.
ETA: Adding links borrowed from oldbloke:
AutoSport: Partial transcript of FIA interview with Pat Symonds (Executive director of engineering)
AutoSport: Briatore and Symonds leave Renault
So they're losing their CEO and CTO. If Renault do get banned for next season (which would be a relatively light penalty), then that releases the '14th' team place for the reborn Sauber.