[GMontag]

The latest Flaming Lips album, At War with the Mystics, is quite good.

As for artists you are missing, check out Mars Volta and their previous incarnation, At the Drive-In. Also, the poster boys for indie rock, Ween.

I've been getting into the indie stuff coming out of Toronto lately. Artists like Broken Social Scene, Stars, and Feist make some very good indie pop/rock.

If you are into post rock (i.e. mostly instrumental, neo-classical stuff), many of the same musicians of the above groups also perform in groups like Godspeed You! Black Emperor, A Silver Mt. Zion, Do Make Say Think, and Valley of the Giants.