I am curious about your screen name: do you drink lots of java, or do you program in java? Or is there a third explanation
...... Ha Ha..... maybe he's from Indonesia?
Anyway, welcome to the EF.
I'm also an Aussie, and the mountain biking here is fantastic. Bringing a bike with you is a good idea, if only to have wheels immediately.
Weekends here are pretty good with some careful planning. NEVER allow yourself to have an "Open Sunday".... nothing is open.
While you're here in Switzerland, keep a close eye on this forum. It really is the best way to find things to do, and how things work, etc.