1. A system for integration of client interaction technologies, comprising: a plurality of resource managers, each comprising at least a software service operating and stored on a network-connected computing device; a plurality of resources, each comprising at least an network-connected computing device; a monitoring service, comprising at least a software service operating and stored on a network-connected computing device; and a callback cloud comprising a plurality of network-connected computers adapted to provide voice callback services on demand; wherein a resource manager receives an interaction from a communications device via a communications network; wherein at least some of the plurality of resources regularly report their status to the monitoring service via data communications across a network; wherein the monitoring service determines a current status and an expected availability of resources based at least in part on status reports received by the monitoring service from the plurality of resources; wherein a first resource manager sends an interactive indicia comprising at least information sufficient to enable a callback request to be made if desired in response to an interaction received from a communications device via a communications network, the information based at least in part on the current status and the expected availability of resources determined by the monitoring service; wherein the callback cloud receives an interaction request based at least in part on information sent by the first resource manager in the interactive indicia; and further wherein the callback cloud generates a callback via a telephone network to an interaction request.