The current steps outline how to compile the package yourself, however, they do now have a version for the raspberry pi, well, up to 0.10.26 anyway.
So might be worth changing the Debian NodeJS section with
wget http://nodejs.org/dist/v0.10.26/node-v0.10.26-linux-arm-pi.tar.gz
tar -xvzf node-v0.10.26-linux-arm-pi.tar.gz
node-v0.10.26-linux-arm-pi/bin/node --version
You should see: v0.10.26
NODE_JS_HOME=/home/pi/node-v0.10.26-linux-arm-pi
PATH=$PATH:$NODE_JS_HOME/bin
npm —version
You should see: 1.4.3
Not sure if this helps or not..