Living and Working in Switzerland Official information for Newcomers - the Government Site.
Swissworld - Your Gateway to Switzerland. There seems to be an unbelievable amount of information on the site itself and there are also many external links. The FAQ section includes questions which EFers often ask and the Page with Government links could be useful too.

Many things in this country are ruled by the communes (parishes, towns, villages) so the list of links to them is also a great idea.

SwissInfo - Current news stories on many subjects and in many languages -
Just Landed - Another link for Newcomers - in English. Lots of information and more links.

'About Switzerland' - Some of the Info in here is two years old; kindergarten/school begin need checking; good information though.
AngloInfo - help for new arrivals and others

Greater Zürich Area - Information on the whole of Switzerland too. Easy reading for newcomers who know nothing about the country.
Social Security - Rights and Obligations

Hello Schweiz - more to look at; unfortunately only in German.

Obviously personal advice from those in similar situations can be more helpful and more detailed, but these Sites could form a basis of background knowledge to your 'Swiss Experience'.

Students in Basel - A Thread in Introductions, but has several useful links and tips in.

More Information given by another EFer here