1. A computer-implemented method employed within a network of application server instances having a cluster architecture, comprising: registering a plurality of management beans (MBeans) with an MBean server, the MBean server providing the MBeans with access to manageable resources of application server instances within a cluster of application server instances, the manageable resources being monitored by the MBeans; displaying a representation of the plurality of management beans (MBeans) registered with the MBean server on a graphical user interface of a computing device, the registered MBeans including monitor MBeans and runtime MBeans, the monitor MBeans retrieving monitoring data from the runtime MBeans and the runtime MBeans providing the monitoring data to the monitoring MBeans, wherein each of the displayed MBeans represents a manageable resource of an application server instance within the cluster of application server instances; monitoring the manageable resources within the cluster, including the monitor MBean retrieving the monitoring data regarding the manageable resources within the cluster from the runtime MBeans associated with the manageable resources; selecting one of the plurality of MBeans displayed in the graphical user interface; and accessing an attribute of the selected MBean with the graphical user interface to view the retrieved monitoring data regarding the manageable resource represented by the selected MBean.