Well, I'm excited about the new Pocket Wizards and their ability to support ETTL. However, I learned of a serious concern. Apparently when using them with a 580EX II, 430EX II or 430 EX the range of the triggers is limited to 50 feet. This is a pretty serious issue for me. 50 feet is not nearly enough. I'll continue to monitor this but it is something that would make me go with RadioPoppers over the Pocket Wizards.
Also, I learned something new about the RadioPoppers this week. Seems with a PX transmitter you can get High Speed Sync even when using JrX receivers. This is very exciting as it allows a step into a high value (at least for me) feature without having to shell out for the PX receivers initially.
I'll let everyone know what I continue to find out.