The current crop of derivative 70s rock bands has a place, and that place is, I feel, in live shows.
I am not sure if anyone really needs a Wolfmother album, however wonderful their mystical cover art may be.
However, discovering a ticket stub to a Wolfmother concert would not be cause to kick someone out of your life, because they probably had a whole lot of fun, just as I did when I attended the Wolfmother show in London.
But you didn't see me come away with a CD in my hand.
By its very nature, much of this kind of music is rendered flawed by
this related issue.
As for Gnarls Barkley, well I have the
St Elsewhere disc and love about 40% of it. The other half veers from average to uncomfortably-close-to-Outkast (no, no, no, no, NO), so I don't think we can get too excited about them yet. I certainly wouldn't want to find evidence of a pre-order for their next album while rummaging through a prospective partner's wallet / receipts drawer.
Noonday Underground are a cooler Gnarls Barkley in many ways, and both
Self Assembly and
Surface Noise are allowed, indeed even encouraged.