Just a frenzy build i've been working on, It's main goal is just huge single target damage.

http://us.battle.net/d3/en/calculator/barbarian#WXiPfR!Ych!ccaZcb

Use frenzy as your main fury gain, Leap is for getting out of sticky situations for the most part,
wrath and battle rage are to maximize damage output, With the added bonus of wrath increasing survivability and being able to dump some fury every once in awhile.

Ignore pain is mostly just for life threatening situations, Though it has a decent CD so it has some spammablity, Weapon throw is my fury dump for AoE damage for large groups of enemys, Though i'm not sure if there is a better option for that slot.

Feel free to rip this build apart, But please try and keep it constructive, Thanks.