The Bash Prompt package was available at http://bash.current.nu/, and is the work of several people, co-ordinated by Rob Current (aka BadLandZ). The site was down in July 2001, but Rob Current assures me it will be back up soon. The package is in beta, but offers a simple way of using multiple prompts (or themes), allowing you to set prompts for login shells, and for subshells (ie. putting PS1 strings in ~/.bash_profile and ~/.bashrc). Most of the themes use the extended VGA character set, so they look bad unless they're used with VGA fonts (which aren't the default on most systems). Little work has been done on this project recently: I hope there's some more progress.