First off, I'm really sorry your son won't be getting a wish. I think that's just terrible.
I also have to say that this whole cancer thing really irks me. Since when are diseases in competition to be the most serious? Since when is the Ronald McDonald House only open to the "sickest" patient? Should we be lining up all the kids and doing triage like they do in an ER to determine who gets what make-a-wish trip and who gets what room in the RMH and who gets what flavor jello in the hospital cafeteria? I mean, I just find this whole thing ridiculous! Why would you ever, ever, EVER want to compare one child's potentially deadly illness to another? I don't care if the kid is dying from an ear infection...it's still every bit as tough on the family.
I might get some heat for this, but I think IF they are going to consider a criteria other than simply "all life-threatening diseases" it should be financial need. If they are going to say that there are limited funds and they have to spend wisely, then they should either 1) require wishes to be a little more realistic in terms of cost, or 2) make the wishes only for families who could not otherwise afford something like a vacation or a bedroom set. I'm not saying that they SHOULD take the latter approach, but I do think it would be better than excluding a disease that carries with it as much chronic illness and emotional baggage as CF.
Also, not many pediatric CFers need transplants in this day and age, thankfully, but MAW only grants wishes up to 18. So just b/c CFers often make it into their 20s, after years and years of repeated hospitalizations, before needing new lungs, now we're not eligible at all?
I can totally accept that a kid with cancer who is in remission deserves a special "wish" for all s/he has been through and I would never begrudge that child the chance. I would hope that family's child wouldn't begrudge a CFer that chance either.
Sorry for the rant. I never had a wish granted, but I do contribute to MAW and consider them a really great charity. I might have to reconsider if they have such arbitrary policy, even on a local level. Have you tried contacting the national branch and sharing your story? Even if it doesn't get you a wish, it would still be worth asking for an explanation.