... Wait a minute everyone..., GREAT NEWS! Finally able to get the newer release of iScan (after endless searching). Installed newer .deb package, and then ran sane find scanner utility. Once scanner was detected, (of course, after installing iScan), I then rebooted system, and WAHLA!!! I have Karmic Koala running with working WorkForce 500 printer and scanner.
Originally Posted by MaquinaX
Good luck to everyone, and working together is how we move foward...
Newer iScan .deb
Find Scanner Command
sane-find-scanner | grep 0x04b8