Okay, after several days of testing I'm promoting sudser 0.2.0 from extras-devel to extras.

Unlike the 0.1.0 series, it will allow you to run only the shell in password-protected mode (including the 'rush' script). This solves the problem with lockups during boot-up.

Unlike in the previous version, you can switch password/passwordless mode at any time now. For this, just run the 'sudser' command in the terminal. If you have openssh installed, you'll get a GUI password prompt. If you don't, it will read your password from terminal.