Long time no see huh? ;) I'm diving into Amazon Web Services for some months now, and I must say I'm pretty impressed by the overall quality. Compared to the other “clouds” I've played with, it's the most mature and comprehensive by far. While writing a couple of tools to make my life easier, there's one piece that took me longer: filtering the output of the aws ec2 describe-instances command. The output is in JSON, which is quite nice you might say, and it is, but when it comes to interact with JSON in the command line, things can get a little messy.