The Winter '06 documentation states that: "Each custom object can have only one master-detail relationship, but can have many lookup relationships, up to a total of 25 relationships. Each relationship is included in the maximum number of custom fields allowed."

I have a scenario where I would like to create multiple master detail relationships with a few custom objects. For example:

Object 1 (Master) (Detail) Object 2 (Master) (Detail) Object 3 (Master) (Detail) Object 4

Is there a specific reason why this restriction is in place that I should be aware of? Or is this something coming on the roadmap?

Thanks!