I think this has been covered somewhere before, but hey, i'm game to repeat myself

Lostprophets- Startsomething (sets the mood of the album brilliantly)
Joy Division - Unknown Pleasures - A classic
Muse - Absolution (weird, apocalyptic - completely Muse)
Theres probably more, but i can't think

Sorry if its been covered before. DOH!!!! i should have checked. How stupid do i feel?

except peter saville covers for new order/factory/suede etc...
hhmm

among others

clinic - internal wrangler (but of course it was copied from ornette)
zoot woman - s/t
broadcast - Noise made by people
st.etienne - sylvie (single)
belle and sebastian - 3, 6, 9, seconds of light
tahiti 80 - puzzle
lemon jelly - lemon jelly.ky
blur - think tank (because i love banksy)

i agree with teh super furries covers

then id say:
manic street preachers - you love us (heaveanly single)
manics - Faster / PCP (single)
Kinesis - Billboard Beauty
Colour Of Fire - Cut It
Public Emeny - it takes a nation of milliongs
Clash - London Calling

MBV's "Loveless". An incredible image, beautifully captured, that sums up the record perfectly.

I'll happily second mentions for "Unknown Pleasures", "Chutes Too Narrow" and all the Furries' stuff, as well.

Foo Fighters - Foo Fighters

I heard that it's Buck Rogers' gun. Don't know whether it's true. Nice piece but.

Caravan - In The Land of Grey and Pink

N.

Smashing Pumpkins' "Machina", 'cos it's a fantastic piece of artwork in its own right, but coupled with the record itself and the themes running through it, it's even more amazing. Apparently there's all sorts of meanings and lyrical connections behind the different parts of the cover. Got a huuuuge poster of it on my wall... :-)

I've seen this thread before, but I'll repeat myself :P
I love the cover for The Nerve Agents - The Butterfly Collection. It's really sad looking.

Most Pearl Jam records have great covers, particularly the original fold-out No Code, and even more particularly, the whole of the Vitalogy 'package'.

I'm also gonna say 'Pump' and 'Get A Grip' by Aerosmith, 'Troublegum' by Therapy? and all UNKLE stuff with Futura's shit on it. (Not literally). Ooh, and NIN's 'The Fragile'.