...The same could be used with Linux too, however we have to carefully manage co-location of MySQL clusters SQL node, Management node, and FreeRADIUS application itself. Since mysql cluster needs minimum of 3 nodes for providing high availability...
http://blogs.sun.com/yousuf/entry/freeradius_with_mysql_cluster
...after UI Changes: This release adds support for nodemanagement to the node details view. It updates the tree view...Rrelease-after GUI Changes: This release adds nodemanagement features to the query/search results window...
http://freshmeat.net/projects/spt-jcr-manager