Let me answer some of your questions and quash the rumours.
1. There is a kiwi working there and she is non-op. She did not validate because of various reasons one being her lack of french skills.
2. In Geneva (that is where i worked) you need a fluent knowledge of french and in Zurich you need a fluent knowledge of German. Any less and you are kidding yourselves.. there is alot of traffic there and things move very quickly.. if you can't keep up with the french going on around you you'll never be able to manage the traffic.
3. As for many expats, yes there are about 20 or so but it's not the typical "expat" life as one might expect. It's very expensive living there. The salary is based on your experience.. someone with 8 years validated experience would expect approx 160.000 CHF per annum.
4. There is no day long interview, you will meet with the HR guy, then meet with the training manager. You will then have a sim test that takes about 1 hour where there will be a good load of traffic. If you pass this test you will briefly meet with the facility manager and if you meet all other qualifications standards they will give you an offer on the spot. This is what they did for me.
If anyone has questions feel free to message me, I worked there from March 2001 til March 2003. It was a good working experience it just was not for me. I am Canadian and will be heading back to Canada eventually.