I have a morbid fascination with improving my workflow and programming environment, so I absolutely adore combing through other developer's fabfiles. This one is definitely nicely put together, and there's some nice gems I look forward to adapting into my own.

I'll say this though: while fabric is _ok_ at configuration management and provisioning new servers/instances, it's absolutely dwarfed by real tools for that kind of job. If you value your sanity and want another excellent tool in your arsenal, look into using Chef or Puppet for building servers (with a dose of Blueprint for reverse-engineering your existing requirements). Fabric is great at everything else it does, but for building new servers it's very flimsy and prone to break, which can cause many a needless headache. I prefer Chef, but Puppet is equally excellent. Do yourself a favor and take the afternoon to learn one or both.