When demonstrating Lotus Sametime I like to show dialogue between real people logged into the system. When a network connection is not available this can get a little tricky.
Mikkel Heisterberg has published a tool via Intravision that allows you to simulate people logged into Sametime in various states such as Avalable, In a Meeting, etc.
I've used similar tools in the past that people have hacked together - however this looks like a really nice solution.
Now, if I just had a little Sametime "bot" that could give answers to questions.