Geneva is an international city. There are a lot of international organizations in the city: UN, UEFA, WTO, etc.
I am currently working on mapping Geneva with addresses. I use bicycle and OSMpad for iPhone 4S, and my own free time, mostly on Sundays.
If you want to join this project and do not know how then write me a message and I would provide some tips. To support the project visit my website www.openbusinessmap.org
It would take about two years in my estimation to mark all house numbers in Geneva.