My suggestion would be to loosen you attachment to ADO and consider XML as the vehical for moving data between layers. XML is simple text and it an extremely efficient way of moving data around. It works for LANs quite weel, but it really excels when you get to WANs or Internet situations where you need to ove data across phone lines. ADO objects can be a bear in the internet arena.

You can still use ADO within a layer, for example the data layer could use ADO to access the data base, but then it would convert the reocrd set to XML to send it to the business layer. The business layer receives its data as XML then converts it to whatever it needs to support the interface it exposes to the Presentation layer.