I just received an email from Swiss Rail about a neat 2 for 1 promotion on City Night Line trains:
"Two for the price of one! Anyone booking a berth on one of our modern night trains can take a friend with them for free. This offer applies to both sleeping and couchette cars. So, you can enjoy travelling together while also making a double saving: prices each way start at CHF 146 in a couchette car and CHF 246 in a sleeping car. City Night Line – arrive after a good night's sleep.
Book by 15 November 2008, travel by 13 December 2008 www.citynightline.ch"
Thanks for the heads up on this too bad the window isn't through the 18th, when I am looking to travel.