Boundary? Wot boundary?

Disappearance of the network boundary is a 28-page ISF Digest (report of a special interest group) from the Information Security Forum about the increasing Internet connectivity of today's typical corporation. As the traditional fortress wall/network perimeter is dissolved, the boundary security controls can expand to somehow incorporate untrusted devices Out There in webInterland or contract to protect devices In Here from all other devices [this is a false dichotomy if changes may take place in both directions at once]. The report recommends gradual evolution of current security controls in the short term and investigation of other options in the longer term.