This week the Learning Curve delves deeper into what bands could be on the brink of stardom, ready to break out. Some are signed and some aren't, but keep in mind

California metal band Eighteen Visions have called it quits after 11 years performing together. The I Let Go performers are hoping to move on to "fresh and new" endeavors.

...During July, co-founder and original Pink Floyd guitarist/singer Syd Barrett, who had spent the better part of the last 35 years as a hermit, died at age 60 from diabetic complications... Weezer singer Rivers Cuomo pretty much confirms rumors that the band is done, "unless," he says, "it becomes really obvious to me that we need to do one."

Bullet For My Valentine are one of the fastest rising rock bands around today. With an aggressive Emo sound, Bullet is quickly climbing to the top of the Modern and Active Rock charts and have toured with the likes of Metallica, Guns N' Roses and Rob Zombie. The band recently finished playing the Vans Warped tour and is currently co-headlining with Eighteen Visions. They'll open for Iron Maiden in October.

The Huntington Beach quintet Avenged Sevenfold has been revealed as the mystery mainstage act of this summer's Ozzfest kicking off on June 29th in Seattle. "Ozzfest has so much history," says frontman M. Shadows. "We are honored to be sharing the stage with so many great bands and even more excited to be a part of the legacy that is Ozzfest."

Prog-rock quartet Coheed & Cambria will take to the road with metal outfit Avenged Sevenfold in early April. The bands will split stage time opening and closing each show; each playing a full set. Coheed & Cambria will also be making appearances at several summer festivals both in the U.S. and abroad.