I've been an Animal Collective (and associated projects) fiend for the past few months. It's definitely not for everyone, though... other recent heavy rotation albums/bands include: New Pornographer's "Twin Cinema", Sufjan Stevens "Illinoise", the Dresden Dolls, new Stephen Malkmus, Ethiopiques (an ethiopian pop/jazzy comp), and Mr. Bungle's "California" (recently discovered my be... wow...). Not exactly under the radar stuff, but it's what i've been listening to a lot.
If a band called the Woggles comes to a town near you, go see them. The most fun I have at shows since the Dismemberment Plan broke up. They are AMAZING live.

PS - I think Robert Pollard is the best drunk with a guitar ever. Though the competition is stiff...

PPS - The Notwist are great. Recommendation seconded.