It would be useful to add usage logging for plugins that the user installed that are not a part of the distribution, so it is possible to find out what plugins have people installed and how many people use individual plugins.
Fixed by USG_USER_INSTALLED_MODULES log record:
Integrated into 'main-golden', will be available in build *201305042300* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
Log: #203962: User installed plugins are logged.
Thanks a lot Martin. Can you please also document this in wiki? Thanks.