nodejs on Fedora 18

Node.js has been added as an available package in Fedora 18. Note that it is currently only in Rawhide and Updates Testing repositories. So, to install, first make sure that Updates Testing repo is enabled and then install nodejs package.
sudo yum install nodejs --enablerepo=updates-testing

After that install NPM:

git clone https://github.com/isaacs/npm.git
cd npm
sudo make install

Finally, install sugar-on-top CoffeScript:
sudo npm install -g coffee-script


More info on available packages: RPM resource nodejs