Sorry if this is a repost, I searched but didn't find it.
I was leveling my ally rogue when I had to shadowmeld to drop agro. The mobs reset and I was going to take a second go at it so I stealthed and it didn't seem to work. It did, mobs won't see you and you will still get stealth bar and the stealth buff, but all players and yourself will see you as if you are normal. I know it is kind of useless, just found a possibly new one for myself and thought i'd share :P
Steps:
Shadowmeld
Wait a second or two until it shows that you are stealthed
Use rogue stealth
???
Profit