It's simple. Just stay logged-in at Ustream. Log in at Ustream and make sure you check the "Remember me" box before you hit the "Log in" button.
When you're log-in at Ustream.tv, and then you come here to Public Pool, you stay logged in here automatically. So, you don't have to re-login every time you visit the Public Pool's chat!
As a note, you don't have to have keep the Ustream page open in order to stay logged on Public Pool--it remembers you.
- Macro Man Jr.