I was playing around with GoogleCL recently and came up with this: http://github.com/ianoxley/googlecl-export

It’s a Bash script that lets you export a list of Google Docs to a specified format. For example, to export a particular folder to PDF you’d type something like this:

googlecl-export -f pdf -d yourfolderofdocs

You need to have GoogleCL installed for the Bash script to work (GoogleCL can be downloaded from http://code.google.com/p/googlecl/) but otherwise you should just need to make the script executable e.g. chmod u+x googlecl-export and possibly stick it somewhere on your $PATH