I've created a list here and as far as possible have noted what has already been done

http://wiki.openstreetmap.org/wiki/Switzerland/2013_Municipiality_Mergers

I'll be update the street name comparisons at http://qa.poole.ch/ch-roads asap to any changes in the boundaries, this isn't critical because I use a separate set of boundary polygons for the calculations anyway, it is just the two maps that are really affected.

Simon