Thanks Lauren. This is good info. We will be writing the parent lead ID to a custom field in SFDC and use Eloqua logic (if has lead ID created child lead) to identify when to create a parent or a child. I don't know SFDC well enough to know if there is a feature that will provide visibility into the relationship (like int he contact object). THis can get pretty complex very fast, so still whiteboarding quite a bit.
We spoke with SFDC and they do not have this process documented in any way, so nothing to follow or give insights as to best practice or approach. Are you aware of any place where this approach may be documented?
Thanks,
Shane