Dave Grohl's primary band Foo Fighters have a new greatest hits collection out this week , and though it has two new songs on it (including the single "Wheels"), Grohl is focusing his new output on the supergroup Them Crooked Vultures. The band reunites Grohl with Queens of the Stone Age frontman Josh Homme (Grohl played drums on QOTSA's Songs for the Deaf) and adds Led Zeppelin bass player John Paul Jones. The result is a throwback power trio whose debut album is full of swampy riffs, doomsday vocals and lots and lots of volume.

The band is currently offering up a free song on iTunes called "Mind Eraser, No Chaser." Built around a psychedelic guitar loop, the tune is the perfect blend of classic rock and modern guitar music tropes. Homme and Grohl share vocal duties, including a call-and-response section where Grohl shouts "All I wanna do is have my mind erased!" It's mostly just refreshing to hear Grohl behind the skins again, as his drum style is uniquely savage and -- keeping in step with the rest of the band -- extremely loud.

It's a big week for fans of Grohl's rhythmic skills, as this week also marks the release of Nirvana's "Live at Reading," the album and DVD of the legendary band's notorious set at the Reading Festival in 1992. It's the portrait of a band absolutely hitting on all cylinders and unleashing a difficult, anthemic set to a rabid festival crowd. Grohl's work behind the kit is fantastically brutal, especially on the rarity "Been a Son."

In the meantime, Them Crooked Vultures' debut album self-titled debut will hit stores on November 17. -MTV.com