LuckyMD2b,
You are right about the difference between peds ortho and peds surg. One is purely ortho related stuff and the other is more of the general surgical aspects of peds.
I think that there are only about 100-120 peds surg spots in the US each year. Obviously, there is a very limited number of programs, so 36 sounds about right. Your could check FRIEDA on the AAMC site if you wanted to know for sure.
I think that there are a few reasons for having the smaller number of fellowship positions. First, pediatric surgery isn't like adult surgery in the fact that there is really a lot less pediatric surgery to be done out there. For that reason, I think that the peds surgery establishment tries to protect itself by not inundating the market with a ton of new peds surgeons.
Does getting a fellowship at a peds program require research in residency? I think that this is almost invariably, yes. First, I think it is poplular enough that there is often many more applicants than there are spots. Therefore, one must do something to differentiate themselves from the next applicant. If you are interested in it, you should definitely try to position yourself at a university program that has active research under pediatric surgeons. Also, it is important to try to get into a program with politically strong peds surgeons. Since it is such a small group of people, they pretty much know everyone in that group through conferences, etc. Probably more than any surgical subspecialty, there is strong dependence upon who you know and who is writing your letters. I would check with the head of your peds surg department wherever you are doing med school to find out which programs are the best to apply to.
Finally, there are a lot of peds surgeons that work at community hospitals, they are just the larger ones. My community residency program used to have 3 up until a year ago, and now has only 2, but is looking for a third. Actually, comparing the university program that I graduated med school from and my current community residency program, we are actually quite a bit busier than the university. We are helped by having an affiliated pediatric hospital with PICU and NICU support on site with our general hospital. And that isn't just relegating them to doing solely peds hernias for the rest of their lives, either. They do the entire spectrum of patients--oncologic, Hirschsprungs, malrotations, diaphragmatic hernias, TE fistulas, thoracic, pectus excavatum, etc.