Well yes there is. Oddly enough this is one of the first things I figured out how to do because the pink icon on my desktop bothered me from from the get go.

The first thing you need to do is create a .icns file. The easiest way to do this I have found on a Mac is to select a file or folder whose icon you want to use, open the Get Info screen, and select the image and choose copy from the edit menu.

Once you have the image copied to the clipboard, open your preview app and choose new from clipboard from the file menu. What opens will be the icon you just copied.

Choose save from the file menu and the resulting saved file will be a .icns file. At some point the file will need to be named Application.icns. You can do this now or later.

I realize you may already know how to do this, but I added the process for others who read this and do not.

Now to change the pogoplug icon.

Right click on the pogoplug app in your applications folder and choose show package contents. This will open another finder window that has a contents folder.

Click on contents and then resources. In the resources folder you will see the pink icon named Application.icns.

Replace that Application.icns file with the one you created. Close the finder window.

At this point you need to restart your computer. Quiting and restarting the app doesn't seem to do it. Once you restart your computer and mount your pogoplug, you should see your new icon.

One other thing, you will have to do this same process every time there is an update to the desktop app as the new download contains the original .incs file. Hopefully in the future updates will happen without having to replace the app. Let me know if you have any other questions about this and I'll try to help.

Glad I could help.

Thanks for the help man! This is such a simple fix and I finally have my homogeneous desktop back! No more obnoxious PINK Pogoplug icon!
Cheers

This fix no longer works... Has anyone figured out how to fix it now?