Are output parameters in Stored Procedures supported? If so, how does one do them? If not, are there any plans to support them?

Also, there are no examples on the examples page of using input parameters on SPs, although I managed to get that to work...

For now, I have rewritten my SPs to select the variables I had as output parameters as a recordset, but this is only possible because I have access to these SPs, which may not be the case for everyone...