A Homebrew formula for https://nodejs.org.
NOTE: Work on the official homebrew iojs formula is ongoing. Follow the progress here!
brew install hmalphettes/node/node
Since there is an existing node formula in the offical homebrew repository, you have to reference the fully-qualified formula name when interacting with this formula. e.g.
# If node or iojs was already installed:
brew remove --force node
brew remove --force iojs
brew install hmalphettes/node/node
brew help, man brew or check Homebrew's documentation.