Deep Elm
I ordered a bunch of stuff from them and it never showed up after about 4 weeks I called and asked about it, they gave me a hard time saying that it had to be on my end and that they in their existence have never had any problems getting orders filled and shipping them. I recieved the package a week later with the postage date being for the day after the day I called.
On a positive note Hydrahead, NO Idea, Victory and Revelation records have all had stellar service. They give a ton of free swag (you just gotta ask).