Thank you again to Helibot.
We now have an update to the driver. It contains far more than the original I posted this morning. Now we are able to send data between the PC and robot via the USB cable! Helibot created a new mx1ads_usbserial.o module and did some other coding, made some programs and put together a great little setup so you could test it out on your system. As far as I know, you don't need your bot to have the USBNet feature. The source code and everything are GPL and LGPL so we are able to provide this to you for download. See the end of my article for the download link to the RSMedia USBNet USB driver for Windows Vista (in the last paragraph).
Note that this may also work in Windows XP and 2000 but haven't been tested yet in those platforms (that I know of. I don't know the version of Windows Helibot uses, but I use Vista Home Premium).
We're still looking into doing a serial console to access the linux system on the robot via USB. But this is a big help. We wanted to share the results and give folks something to work with on their own as well. Feel free to download and let us know if you develop anything with it.
I'm going to be updating the RSMedia Development Kit so I hope to include this in that kit. That's why it's only available via a link in my article at the moment. I'll post in the forum when I get the Dev Kit done. I was tossing back and forth about keeping this separate from the dev kit and now I changed my mind again and deciding to include it, eventually. :)