Currently NI-DAQmx does not support RDA; however, you can still use RDA with NI-DAQ v7.0 if you continue to use the Traditional NI-DAQ driver. I really do not know nor can I comment on whether DAQmx will support RDA in the future and when, if it will be supported, to expect this feature. I would highly recommend developing your application using Traditional NI-DAQ under the assumption that it may be awhile for RDA to be supported by DAQmx.
Regards,
Michael H
Applications Engineer
National Instruments