As of about one and a half hours ago, I've been able to disengage one administrator client from one Agent Device. The question now is: is this operation sufficiently generic to disengage more than one administrator client from one Agent Device, and furthermore, is this operation sufficiently generic to disengage two Agent Devices.
The first answer is: yes! It appears that an Agent Device can engage and disengage multiple administrator clients. It does not appear to matter whether these engagements are simultaneous. Additionally, one administrator client is able to simultaneously engage and disengage with more than one Agent Device. All of this is an intention designed from conception in mid-2004 to make Clique Space(TM) useful.
The larger question of engaging two Agent Devices should be answered in the next revision. It is hoped that once two Agent Devices can robustly engage and disengage, then the proposition of constructing neural clusters of Agent Devices might be seriously considered.