it's compressed in FLAC format, meaning that there's absolutely no loss in audio fidelity, as there would be with formats such as MP3 or Ogg Vorbis. i would prefer to keep all circulating copies in the highest quality available, so while you may make MP3s for your iPod, etc, please do not share them with other people - give them a full-quality CD instead!
in order to get this recording out to many people in a short period of time, i've chosen to distribute it through BitTorrent; essentially, you download a small file from me, open it with the BitTorrent program, and then download the concert from everybody else who's connected and down-/uploading. the more people downloading, the faster it goes.
download the Sigur Rós set here
download the Amina opening act here
cheers, and happy downloading!