www.playwinningpoker.com has some decent articles about omaha 8, this was what I first read when switching from NLHE, and Mike Cappelatti's book "How to play winning Omaha high low" was really helpful for me too. Best thing I reckon would be to read around to pick up a basic strategy for the game and play at a stake that you feel comfortable losing at (I played 1/2c and 2/4c on VCpoker) and you will begin to learn about the concepts of the game. The day I first got quartered on the 2cent games changed my whole PLO8 game.