The Microphones - The Glow, Pt.2 - Probably the closest thing I've heard to a true sibling to Neutral Milk Hotel, really amazing creation of a whole-cloth musical lexicon.
You Am I - #4 Record - Quality power-pop
Wolf & Cub - Vessels - Not my thing, but bigger fans of Queens of the Stone Age would probably really enjoy this.
Mudhoney - Superfuzz Bigmuff - Damn, damn, damn good. Hasn't aged a bit.