Some resources on customizing your bash shell (I've hit on a setup I like, it's two lines and has great info for the prompt. It also changes to red when I am root...)

• Bash Prompt HOWTO
• How to: Change / Setup bash custom prompt (PS1)
• BASH Shell: Change The Color of My Shell Prompt Under Linux or UNIX
• reddit: Bash users: What do you have for your $PS1?