Tested: WORKING!
Model: WL-500g
Firmware: 1.8.1.7-2a (RAW and LPR)/ ASUS 1.8.1.9 (LPR only)
Device
Brandname: Canon
Brandtype: PIXMA iP3000
USB Interface: Yes
URL To manufacturer: http://www.canon.com
URL To product: http://www.canon.co.uk/for_home/prod.../PIXMA_iP3000/
At a first attempt with the latest ASUS firmware it did not work, but after uninstalling the printer, re-installing the latest printer driver and choosing the created IP port it worked.
I had the same experience on both PC's on my network.
Afterwards I installed the customized firmware 1.8.1.7-2a I also got RAW printing to work.
Running W2000.