250GB of RAM for 34¢/hour: EC2 spot instances

Summary

Ever needed 250GB of RAM, but just for a few minutes or hours? With Amazon's EC2 spot instances, you can get a machine with 250GB of RAM for as little as 34¢/hour! I'll give a recipe for getting set up with Python + your packages in 10 minutes, and get a remote IPython Notebook to work with.