This is a very interesting question!
Speaking as a relatively new collector/enthusiast (less than a year), the amount of information needed to evaluate a sword is daunting (not to mention fittings). I haven't posted much since I honestly don't know enough to contribute anything useful, and as a matter of fact, I don't know enough to even ask intelligent questions! I have been reading books and this amazing forum, but what I feel I need is to see and hold quality (or even flawed) blades. I try to visit museums whenever I travel, but that's behind glass. And the shows, so far, have not been possible for me (I had the Baltimore show blocked out on my schedule, but then the weekend was changed). This brings up the other limiting factor in this hobby; time. In order to get the funds to afford the hobby, we have to work :-). And then there are the families/loved ones who don't quite yet understand the obsession (at least early on). But these are the same problems with any hobby.
I think one of the best ways to increase the number of Nihonto collectors is to get Nihonto into their hands. Shows, clubs, etc.
Sometimes it's difficult to find where a group will be meeting, maybe that is something that could be listed somewhere.
As for price being a barrier, there are always differing prices and quality levels in every field of collecting. A flawed diamond is still a diamond and someone will treasure it.
Sadly, I, too, am geographically challenged, but hopefully I'll be able to meet some of you at a future show/meeting.
Or... everyone could move to Pittsburgh? That would solve a lot of my access problems :D
As for the positive, this message board is amazing, and the JSSUS newsletters are a pleasure to read (especially the last 2!).
Thank you to everyone who continues to contribute to further this field of study!
Ed Mistler (i almost forgot to sign my post, but then i read the above posts:-))