npm-debug.log

info it worked if it ends with ok
verbose cli [ 'node',
verbose cli   '/usr/local/bin/npm',
verbose cli   'install',
verbose cli   'socket.io',
verbose cli   '--loglevel',
verbose cli   'verbose' ]
info using npm@1.0.1rc9
info using node@v0.4.0
verbose config file /home/rfitzger/.npmrc
verbose config file /usr/local/etc/npmrc
verbose into /cygdrive/c/tools/joyent-node-380b5b5 [ 'socket.io' ]
verbose cache add [ 'socket.io', null ]
info addNamed [ 'socket.io', '' ]
verbose addNamed [ null, '' ]
verbose GET socket.io
verbose raw, before any munging socket.io
verbose url resolving [ 'http://registry.npmjs.org/', './socket.io' ]
verbose url resolved http://registry.npmjs.org/socket.io
verbose url parsed { href: 'http://registry.npmjs.org/socket.io',
verbose url parsed   protocol: 'http:',
verbose url parsed   slashes: true,
verbose url parsed   host: 'registry.npmjs.org',
verbose url parsed   hostname: 'registry.npmjs.org',
verbose url parsed   pathname: '/socket.io' }
ERR! Error: EPERM, Operation not permitted
ERR!     at Socket._onConnect (net.js:576:18)
ERR!     at IOWatcher.onWritable [as callback] (net.js:165:12)
ERR! 
ERR! Please use 'sudo' or log in as root to run this command.
ERR!     sudo npm "install" "socket.io" "--loglevel" "verbose"
ERR! or set the 'unsafe-perm' config var to true.
ERR!     npm config set unsafe-perm true
ERR! 
ERR! System CYGWIN_NT-5.2-WOW64 1.7.9(0.237/5/3)
ERR! command "node" "/usr/local/bin/npm" "install" "socket.io" "--loglevel" "verbose"
verbose exit [ 1, true ]

do you solve the problem?
I' meet it too.