I've split off the MTB route page from the "normal" cycling route page in the wiki.
Mainly because the normal cycling page is simply getting too long and the potential addition of a further 136 local MTB routes would just make it explode.
See
http://wiki.openstreetmap.org/wiki/Switzerland/CycleNetwork http://wiki.openstreetmap.org/wiki/Switzerland/MountainBikeNetwork
I believe I've updated most of the relevant links.
Simon