Live instances

Public

These are public sites running GNU MediaGoblin:

https://gobblin.se (previously mg.wandborg.se) -- Registration open, all media types enabled (except STL/3D, at the moment) -- details; Joar/mg.wandborg.se.
Your browser may not trust the certificate authority: http://wiki.cacert.org/InclusionStatus.
http://roaming-initiative.com/mediagoblin/ running on http://hyperboria.net/ apparently! reddit thread
http://mediagoblin.com -- Currently registration and video are disabled; you have to ping Chris Webber for an invite.

These are instances run by organizations, usually having registration limited to organization members:

http://filme.ceata.org -- Fundația Ceata, Romanian Free Software and Free Culture activist organization. Registration is currently disabled.

Also, these sites are running MediaGoblin, but are for more limited audiences (family/friends of person who's running it, etc):

maiki’s baby photo site
haise family photos (currently with a baby focus)
jpope's instance -- Registration currently disabled.
thelovebug's instance (registration closed)
spaetz' private pics Sebastian Spaeth's pictures, family and stuff (registration closed)
gallery.Dick-Thomas.co.uk Dick Thomas' pictures, family and stuff (registration closed)
media.wigunnara.com Giri Alam's pictures, family and stuff (registration closed)
photos.katsarov.org Photos by Anton Katsarov (registration closed)
media.micha.elmueller.net Photos by Michael Müller, all licensed under CC-BY (registration closed)
photos.technicallyandrew.com Photos by Andrew Browning (registration closed)
noreal.info/galeria Run in a Raspberry-pi by Arder Vegan (registration closed)
ardervegan.info/media Run in a Raspberry-pi by Arder Vegan (registration closed)

You can add your instance here, too!