It seems the only way to send out a trapped PDF file is to embed traps or to use In-Rip trapping. Adobe obviously has the trapping technology why not let the end user trap filed to their specs. and let them save a PDF file. I send out trapped pdf files all the time that were trapped in Prinergy to printers and publications that require the pdf files be trapped. This isn't an option in the Adobe workflow and I'm not sure why.