it did work, with a POP up window at the end of my booking, in Nov 2008.

Nach einer erfolgten Buchung senden Sie Ihre Punkte eingeschrieben an:

SWISS International Air Lines
Abteilung SDC
Buchungszentrale KeyClub
Postfach
4002 Basel

as LX askes to send the key points as registered mail, that costs another SFr 5.50