Dan Ochs of Wrycan Inc. has posted several nice tutorials on customizing the output produced by the DITA Open Toolkit PDF2 Plugin: one covers removing page numbers from cross references, and another explains how to modify PDF2 cover pages to include a company logo. Nice job Dan!
Content Strategy Forum London

DITA-OT: Scaling Images in PDF Output
When generating PDF output via the DITA Open Toolkit, users often stumble over image scaling issues. While smaller graphics are typically rendered without problems, large images may extend beyond the page dimensions, throw errors in the log file or not appear at all. So we need a way to downscale larger images. There are basically [...]