Did this for an article I'm going to be writing.
https://github.com/mpdehaan/ansible-examples
Probably not super-perfect, but thought it chained together some
concepts a bit more completely than the mostly
abstract examples we have now. It shows off includes, basic
variables, multi-node playbooks, services, packages,
and templates.
I'll probably move this over to the contrib directory soon.
This is sort of what I visualize "best practice" playbooks to look
like (using includes to define roles). Maybe that's not
going to be the case though. Who knows! I'd love to see some
playbooks other people are writing.
--Michael