I agree with you about Farha's book. It's more entertainment value than anything else IMO.
I'm more of a PLO8 guy than PLO8, but these are some resources which my PLO friends have recommended:
PLO From Scratch
- a free 14-part article series
Fast Lane To PLO (https://www.youtube.com/playlist?list=PL7F7D426264B8FE8D) - a free video series
There is also Omaha Planet (http://www.omahaplanet.com)
Also, I saw elsewhere that Poker Orifice recommends Jeff Hwang's "Pot Limit Omaha Poker
- The Big Play Strategy".