As announced yesterday, Quartam PDF Library for LiveCode is now a free / open source software project, available under the terms of the GNU Affero General Public License (AGPL).
One of the advantages of version 1.1.0 is that it comes with support for LiveCode Server and On-Rev. I just put up a page with demos so that you can see how straightforward it is to port your desktop PDF generation scripts to .irev scripts.
As it turns out, there are two bugs to address: loading images throws errors, and callback messages have problems as well. Unfortunately, I'm working frantically to finish my presentations for RunRevLive.11 - but now that it's an open source project, anyone can go and take a stab at fixing bugs. So I'm looking forward to your helping hand in finding solutions so we can put out an update soon.