Is there any other all in one NBTEditors atm that you guys favor? http://dev.bukkit.org/bukkit-plugins/nbteditor/
kahlilnc NBTEditor does its job well for most stuff, but if it can't handle 1.8 items, the other options may or may not work either. You could try a standalone application called NBTExplorer which may or may not support 1.8.