[ If you aren't maintaining services for Inkscape and have no interest in doing so in the future, you can stop reading here. :-) ]
For the Inkscape project, a number of us have set up various online services. In some cases the services allow team management, and each of us has our own account; in others we have a single admin account which we share.
For these shared admin accounts, we now have a way to securely share the credentials amongst ourselves, using GNU Privacy Guard (aka GPG), and stored in a bzr repository:
% bzr branch lp:~inkscape.dev/inkscape/credentials
Don't panic! There's only a handful of gpg and bzr commands you need to know to use this, and I've written them up in Cookbook format in the included README:
http://bazaar.launchpad.net/~inkscape.dev/inkscape/credentials/view/head:/RE...
The directions are from a Ubuntu perspective -- please help expand the README with the appropriate commands for other systems.
Drop me a line if you need help.
Bryce