Switzerland has an active OSM community and an above average mapper density. Just as the OSMF at an international level, SOSM sees itself in a supporting role and does not intend to replace the existing community.
If you want to establish contact with other mappers, or just keep up to date, the following media and channels can help:
#osm-ch IRC channel (select #osm-ch)
Schweizer OSM Forum (very low traffic)
All of above are in principle multi-lingual.
There is a regular monthly “Stammtisch” in Zürich (see the OSM wiki). In other region and cities there are infrequent meetups.