How to use Ubuntu one outside the profile folder, or even the c:\ drive
This is an alternative, but I will present it with a side note saying that you might want to know what it actually does. but sure thing this is a valid alternative.
Some reading before going.
Something to consider on the road, hardlink for same volume (same drive letter), junction for different volume (different drive letter) on the same computer.
Small how-to using a program supplied with Windows 7 on the command line.
There is also a nice site with a shell extension here.
This is what I did myself to make it work:
Suppose you have a folder called Safe.data on Z: drive -
What I did was to install the LSE shell extension and then simply right-clicked the
safe.data folder inside the
z: drive and selected "Pick link source".
After that I went to the Ubuntu One folder inside my profile folder
C:\Users\username\Ubuntu One and right-clicked inside it then selected "drop as: Smart mirror".
This work as far as I'm concerned.
Please note that the "junction" link doesn't seem to work correctly with Ubuntu One, and also note that you can't add the "Smart mirror link folder" directly to Ubuntu One settings to sync it directly... to say it otherwise, make sure that the 'smart mirror link' is created inside an actual 'NORMAL' folder and select the 'NORMAL' folder to be synced when setup it up in Ubuntu one options.
That's about it.
BTW, don't know that guy with the LSE thing, but I always advice considering donating if you really enjoy. Those people keep this place nice like this.