Dave -
I need to monitor several DBs - all of which are 9i. My understanding was that I needed Grid control to do multiple 9i databases.

From the Oracle Enterprise Manager Grid Control Installation and Basic Configuration document (Table 1-1):
The Oracle Management Service is installed with and deployed on the Oracle Application Server. As a result, when you install the Oracle Management Service, the installation procedure first installs Oracle Applications Server.
That to me says the entire App Server... am I mis-understanding?

Thanks!
Jodie