New cloud-based apps like OnState that facilitate internal and external collaboration are being rolled-out specifically to address these market issues (see http://www.on-state.com/blog/?p=387). For example, employees may be willing to take a call while at home in the evening, but in turn they’ll want to not begin work until 10 a.m. With OnState’s system, the customer does not know where the employee is, as the employee can collaborate at any time, using any device, from any location. This type of virtualization enables greater collab (for example, as you cite, messaging with clients after hours) while encouraging employees to seek a balance (e.g. cutting out the commute, flexible hours, etc.).