I've done only house games with Omaha, personally. We started with 5k in chips - 10, 25, 50, 100, 500 denominations, started at 50/100/10 for 20 minutes, then went to 100/200/20, 150/300/30, 200/400/40, break for 10 min (take out 10, 25 chip, intro 1k chip), 250/500/50, 300/600/50, 500/1,000/100, 750/1,500/150, break for 10 min (take out 50, 100 chip, intro 5k chip), 2k/4k/500, 3k/6k/500, 5k/10k/1k. We usually capped the blind here, but with usually having around 10 players, we hardly ever made it to the second break.
Edit - we went no limit on our structure, as well.