The Python library I linked to in my previous post predates the usbtmc kernel module - it's libusb based!
So after "modprobe -r usbtmc" and running an example which sends *IDN? to the device, I get:
adodd@quadmonkey:~/Documents/ds1052e$ sudo ./usbtmc.py
[sudo] password for adodd:
IT WORKS! However, I'd like to try and find some documentation on the kernel module based approach, since it's likely more up to date.