I was concerned, too, about protein but it turns out I'm actually getting a lot more protein with a high fiber diet than I was before! I eat a lot of beans and I've had a bit of the gas problem but I've only been doing this for 1.5 weeks now. It does seem better now, though. It actually HURT that first week!
I also don't snack nearly as much - usually I have to remind myself that it's lunch time! Plus, my absolute favorite food is cereal. You can't go wrong with a diet that encourages Frosted Shredded Mini Wheats!