Which npm/bin folder(s) should be in the PATH ? ( OS X 10.8.2 / npm installed with homebrew )

Maybe you are upgrading from old version fo node? I'm using node from homebrew repository since 0.8.17 and i don't have any subfolders in my /usr/local/share/npm/bin. It contains only simlinks to executable scripts of globally installed modules (in /usr/local/share/npm/lib/node_modules). So, i have /usr/local/share/npm/bin in my $PATH and it works fine. If you are upgrading from old version of node and npm, try to reinstall your globally installed modules before changing your $PATH.