The other day we went out for dinner with some friends. Seb finally fell for an iPhone and he showed me a pretty nice app:
Actually the English site is empty so you have to go to the French one if you want more details:
It is a little app, connected to Google Maps where you have all the services: restaurants, shops, you name it, and you can review them and read the reviews. You can see what is around you and then decide weather or not the reviews are good. It is also useful for you to remember if you did not like a certain restaurant.
I know there are tons of apps like this, the problem is that here in Geneva all the american ones are pretty usless because there are not many reviews.