I set up a node server on AWS this weekend using a Micro instance. It took almost an hour to execute my install script (most of that was compiling the lastest Node) but in the end I was charged $0.37 for 15 hours of compute time and some disk usage. Step by step: http://dpritchett.posterous.com/get-up-and-running-with-node...
I did the same thing this weekend. Setting up node on ec2-micro with a ubuntu 10.04 image. The process was mostly straight forward but I had a issue with in correct entry in fstab resulting in not being able to ssh in after a reboot. The fix was simple but I did waste an hour on it.
