I'm running php-resque with PHP and have installed resque-web to use the admin interface.
Problem: How do you password protect the resque-web pages? I am not familiar with Ruby/Rails/Sinatra so a solution that does not require much knowledge of them will be perfect!
The simpliest way to protect a webpage or directory with a password is a .htaccess/.htpasswd file.
To create those files, you could use a online generator like this