Yes! Query tools, people, v7.1 or greater, mod_nsd, sounds good.
Well you can hack together centralized user administration between applications. But its nice to have options provided for initial installations. Maybe this is partly already available with OpenACS?
For example, via system/LDAP, database, database table, etc.
When moving to further integration it requires another level of communication. Such as CORBA or SOAP. The GNUenterprise Application Server uses CORBA to communicate with clients. It could be interesting to combined the two when ready.
