Siebel 7 Integration

I read the previous thread back in April about Siebel 7 and also the one about the Siebel Adapter - but need to expand on them.

We are currently using VB/OCX to integrate Siebel 6 and Legacy apps via 4.0.2 Broker in real-time, request/reply conversation. In going to Siebel 7, we are also moving to AIX environment and therefore cannot use VB/OCX.
Has anyone integrated Siebel 7 in AIX (or anything else) in real-time, request/reply conversation without XML/HTTP? With or without
Siebel adapter?

Any collaborated help would be appreciated.