I pushed some fixes to it today so it would use the standard
module.run_command stuff, which also required updating
module.run_command a little. Basic problem was it was swallowing
errors and I needed to know what was going wrong.
It seems to work for me based on my usage.
Note -- it does work a little differently now, as it doesn't call gpg.
It should also work with $FILE('path') and the with_file lookup
plugin, just pass it 'data' instead of 'url'. I didn't really test
that part 
--Michael