Honestly, I have no idea what Cihan was referring to when he said you could currently do this. PIX 7.0 is slated to have a limited method for doing active/active failover but at the current time, there is no ability to have an active/active setup without using a CSS. You may want to drop Cihan a line (his e-mail address is posted all over the Ask the Expert thread) and get a better answer from him. Sorry!
Scott