Download Unofficial Plex QNAP ARM Packages here
Updated 2013-12-26 : New Version 0.9.8.18.290 of QNAP ARM package. Reduced list of previous versions to five. Older version available on request.
v0.9.8.5.165 ARM x19 - Dropbox - PMS Release Notes | Plex/Web Release Notes
v0.9.8.4.125 ARM x19 - Dropbox - PMS Release Notes | Plex/Web Release Notes
For all the people who want to create the QPKG themself : clone the tiny assemble project on github. And follow the instructions.
I've created a package for Plex on QNAP ARM x19 series NAS. You can get it from above. It goes without saying that it's totally unsupported by Plex!
The files in that package were taken from the Plex for Synology ARM package and re-packaged for QNAP.
On my NAS is works since v0.9.6.x and does quite well (upgrading and fresh installation).
Don't expect any wonders though. Browsing the web gui the first time brings my 1.2GHz ARM cpu to it's limits and it takes seconds to display the items. And fetching the meta data for my music library (750 albums/9500 songs) took ages.
Streaming to my Samsung TV works well, as does streaming of MP4 and MP3 files to my iPad. Some channels do work but not all of them (no idea why).