I've thrown together a Safari extension for adding items to your myPlex queue - as I prefer having a nice toolbar button to having a bookmarklet.
It adds this little button to your toolbar, that does the exact same thing as the bookmarklet:
You can download the extension here: http://themacbox.co....ueue.safariextz
Let me know if it gives you any problems and I'll look into it. Or, let me know if it works well for you - that's nice to know too!
Edited by Alex P, 26 January 2014 - 01:35 PM.