Since Microsoft has said that System.Data.OracleClient will be deprecated in .NET 4.0, what are MicroFour's plans for continued support of Oracle db's?

Well, we have to work out what a solution might be, because Microsoft isn't supporting Oracle anymore. I.e. while they do have a .NET 4.0 Oracle driver, it is depreciated so we are investigating what might be a good approach going forward. This fall we'll be looking at this in more detail.