there's no uber barbarian guide as such, but the only barbarian that seems to ddo well in ubers in a frenzier. theres a guide on this forum in the sticky guides section. Ash Housewares comprehensive guide to frenzy i think its called. you just need afew gear twinks to turn it to an uberer but his skill/stat setup is what you want.
gear in my opinion should be
Arreats,highlords,fortitude,eBotDz,eDeathz,gores,dracs, ravensfrost, any belt with resists, and a resist ring or another ravens (i use carrionwind, but i never really bothered looking for better)
Tankmobile is right, ash's guide is the best there is for now, and if u want a good gear setup look in here: http://forums.diabloii.net/showthread.php?t=516139
IMO Spankeh layout is the best there but it's pretty heavy stuff ull do good without ALL the items he wrote, ull just do it slower