Her basic theory is that gluten digestion in a person with Celiac Disease is obviously a stress on the digestive tract. Couple that with the need for large amounts of water for gluten digestion. The result can lead to water being pulled from other parts of the body leading to localized dehydration. The body will begin to generate histamines to slow the dehydration. These excess histamines and localized dehydration in the lungs, can trigger an asthma attack if you are asthmatic.
After reading her post on Celiac.com, I did a quick search for some other articles on asthma and gluten. I found quite a few - Here, here and here. There is definitely a lot of information out there about the relationship between gluten and asthma.
If you care to find out more about asthma, check out the Asthma Fair this Saturday, May 2nd, 2009 at Wake Med Hospital in Raleigh. The event runs from 9am to 1pm and will feature Twin Cakes Bakery. Click here for more information from the Twin Cakes blog.