The ESP system is getting an overhaul! Development and the New Player Experience teams have been working together on the design and I'm in the middle of coding the update. The design is in a solid enough place that we're looking for player feedback. Take a look at the document and you can comment directly on it or to this post. We look forward to seeing the feedback. Thanks!
The ESP update previously mentioned at http://forums.play.net/forums/GemStone%20IV/General%20GemStone%20IV%20Discussion/Game%20Systems/view/519 is now being rolled out to all instances. Please refer to the ESP, THINK, and CHAT verbs in-game for more information. We will keep you apprised as we continue to roll out quality-of-life features. We hope you enjoy the system!