OK, TAC kind of answered my question on this one, thought that I would post it for others to see.
Junos 10 added in a bit more logging capability in the standard log messages file. An example of the logging that is done in Junos 10 can be seen below showing a login and logout.
Nov 27 16:01:07 Router1 httpd-gk: DYNAMIC_VPN_AUTH_OK: user user1 with remote IP 66.129.243.232 authenticated successfully Nov 27 16:01:16 Router1 httpd-gk: DYNAMIC_VPN_CONN_EST_NOTIFY:
Connection manager receives SA established notification for ike-id test1 Nov 27 16:01:17 Router1 httpd-gk: DYNAMIC_VPN_LICENSE_GET_OK: Server successfully got an Access Manager license for user1
Nov 27 16:02:42 Router1 httpd-gk: DYNAMIC_VPN_CONN_DEL_REQUEST:
Connection manager receives delete request from the client for ike-id test1 Nov 27 16:02:42 Router1 rtlogd[988]: DYNAMIC_VPN_LICENSE_FREED: Dynamic VPN license returned, license 50 free, 0 overdrafted, 0 used