I have to agree with Rev in disagreeing with MJ Mooney, Joy Division are one of my favourite bands but oddly I find New Order incredibly average.
And Radiohead are not overrated either, as are the Smiths.
In terms of overrated bands, well....
RHCP
Sonic Youth
Big Country (for a certain someone)
Talking Heads
Coldplay
Tenacious D
Libertines
In my humble opinion of course :winkold: