It sounds like what you really want is some kind of service that you can install on a server.
To think out loud for a moment…
# apt-get install document-handling-server
Document Handling Server 0.1 Starting up
DHS running on port 2005 (HTTP)
Users on the same subnet could print to the DHS, maybe upload files to it
scp spreadsheet-to-convert.xls email@example.com:/var/dhs/incoming/
…and then download the results a while later (although how would the document converter service know what output format you want, if it’s not PDF?..hmm)
scp firstname.lastname@example.org:/var/dhs/outgoing/spreadsheet-to-convert.pdf .
Anyhow, I don’t know of anything like that, currently. But it’s an interesting idea.