How about a feat for DnD Next?-
Group Stealth-Feat
Your group has spent many hours training to be a ghost on on the beeze
Benefit: For ever other person in your party with this feat, gain a +1 competency bonus to stealth checks.
Thoughts?
Daily Punch 4-23-13
Throat Punch Games 
I’m not a huge fan of this one. I can see where it would fit in and could have good use but it is all based on other members of your group also taking this feat. Sadly i think it falls behind feats such as the skill focus (sneak) due to the fact that the skill focus allows you to potentially save a botched sneak attempt by taking a 10.
I don’t think the skill focus feats will stand the test of time. They are a little too broken as you can not autofail on a 1.