The dongle is only an idea at this point, perhaps for an OEM. They have no design plans for this.
Pardales - Yes, it will work with my Off-Ramps, but the clock in it will undoubtedly need to be replaced with a Superclock4. I expect it to be too jittery stock. My hope is that the same clock used in the Off-Ramp can also drive the WiRanger. If not, then I believe that a Pace-Car still may be necessary to get really low jitter.
For other USB DAC's the WiRanger can also be used, but I believe the clock will need to be upgraded first to reduce jitter. Using it stock may be worse-sounding than wired USB. I guess we will find out in about 1 month.
If the Geffen device is based on Ultrawideband, then it will probably not work.