Today, my usb adapter arrived. Joy!
The phone I'm using is a HTC Touch Diamond, since it does not have a removable storage card.
So first I hooked up straight to the flash thumb drive. My thumb drive glows when it's plugged in / drawing power.
Result: It did not glow. It did not show up in the File Explorer on the phone.
Then I hooked up my Archos PVR to it. When the pvr recognizes a usb connection, it goes into sync/hard drive mode.
Result: Neither the PVR nor th phone knew they were connected to each other.
I haven't hooked it up to the phones dual dongle yet, so it could be charged while connected, but I doubt it will change the results.
Conclusion: The experiment was a FAIL.
I believe, if it is possible to overcome the power issue, it would still need some sort of driver to allow for the INPUT of a secondary drive (that's why the computer files don't show up on the phone).
Thanks all who've followed my experiment. At least we can say: It's been tried.