Since Nov-2008, two customized Bugzillas that are in use at NASA, one for the space shuttle
(tracking problems with every part of it) and another for the International Space Station
Welcome to centre of multiple hosted Bugzilla instances for management of bugs, issues, problems and requests.
You can create your own free instance here.

Bugzilla iPhone App

Bugzilla Android App
A little help for those lookig for Bugzilla batch / bulk input or import from Excel is here.
Site is owned by EuroPM.
Issues/Requests (but search for existing first!)