So Out of Tune
Following in the footsteps of Listen to the Dead and Phish Tracks, here's a Wilco website where you can stream what appears to be the majority of their shows: http://sooutoftune.org/
Looks like it also includes solo shows and side projects by various members.
Rejoice, Wilco fans! The Spiritfather has bestowed upon us a great bounty of kind tunes to groove in the fields to. And all was well throughout the land.