I know this isn't in the correct forum (Using a Verizon SGS3), but I wanted to post confirmation that this does indeed work. Your mileage may vary, but if the SGS3 can work, I'm assuming this applies for older Samsung devices as well:
- Successfully ODIN'ed a new recovery IMG on Windows 7 (in conjunction with Parallels 6 for Mac OS X 10.6.8)
- Used a random Windows 7 iso I had lying around. This was a brand new Windows installation, and no out-of-the-box modifications were made to OS X, Windows, or Parallels (except for downloading/installing the Samsung USB drivers, as suggested in a previous post).
- My SGS3 was actually soft-bricked (Could not boot into recovery OR download mode.. Holding the power button would greet me with a "Could not do normal mode. Booting into Odin Mode" error)
- Turned phone on (auto-booted into ODIN mode), plugged it into the Mac via USB, and was greeted by a dialog noting that a USB device was detected. It asked if I wanted to access the USB device via Mac or Windows 7. Chose Windows 7, and Odin was able to connect to it flawlessly.
If there are any questions, please let me know. I was running around like a chicken with my head cut off trying to find a solution (I'm on vacation in Germany and for some reason Windows PC's are avoided like the plague) and didn't want to go through the trouble of using Parallels unless it was confirmed working. For others in the same boat as me, let this be your confirmation. It works!!!