Looks as if dedicated Flight Watch frequencies are going silent as of October 1, 2015:
http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/systemops/fs/changes/
Looks like those services will be moved to FSS frequencies.
http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/systemops/fs/changes/
Looks like those services will be moved to FSS frequencies.