I'd recommend reading Omaha Holdem Poker by ciaffone , Pot limit no limit poker by Reuben/Ciaffone, and How Good is your pot-limit omaha? by Reuben. As far as posters go crockpot and Big Dave D both have websites that are pretty good. I think crockpot's is
www.winningonlinepoker.com and I can't seem to remember what Big Dave D's is so hopefully he'll be kind enough to post it.