I want to deploy a "Did you know..." or "Tip of the day" application at the office. It should:

• Show a dialog at login time with a random tip.
• Obviously, provide some way to store my own tips.
• Be easy to disable and reenable by the user itself.

I'm using puppet, so I'm covered with the deployment. The tips don't even need to be gathered from a server, since I can deploy the newest tips file/database with no costs.

Sure, I could hack a quick solution by using zenity and bash, but I'd like to know if there's any application out there specifically targeted at this.

I don't like the zenity approach very much because it's very limited on the contents that can be displayed. No text alongside screenshots, for example. Zenity is aimed towards displaying simple dialogs.