We are implementing AII/OER and as a BizTalk shop have an exception process any time we need to look at other integration/connector technology. I don't really see any feasible options to PI but one thing to look at is the availability of RFC's. We'd have to build our own queuing/reliability into the BizTalk side so it would be a lot of work. Typically I could go out hunting for RFC's updating familiar tables, etc. but AII/OER are huge and I'm not familiar with any of it. Can anyone give me a shortcut to RFC's that could provide some alternatives to the PI proxy based integrations.
Any I know what your thinking... why would you? I know. Officially it's to make sure we have lowest possible TCO even of we have to go through all this at the start. We just have to determine just how painful it would be to not use PI.