I'm sure this is old news for some of you, but The Internet Archive has a massive section with LEGAL bootlegs for you to download. I've downloaded tons of bootlegs today with artists like Namaste, Godspeed you black emperor!, Alex Skolnick Trio, The Grateful Dead, ...And You Will Know Us By the Trail of Dead and Charlie Hunter.

Most bootlegs are available in 64Kbps MP3, FLAC (lossless format), Ogg Vorbis, VBR MP3 and streaming.

http://www.archive.org/audio/etreelisting-browse.php

Enjoy!

random picture:

I'm really big on bootlegs...only video, though. I've amassed quite a collection though, and I have nearly 150 shows. But anything Dev releated has managed to elude me, much to my dismay.