I, too, have at least as much experience with printmaking as with photography. Numbering or not is entirely a personal choice, it seems to me. What does seem important is that you do it, if you choose to, in a way that is consistent and one that simply and honestly tells the consumer (and reminds you!) about the size of the edition, rather than in a way that hides information about it. Print numbering has been grossly abused by some to make fine art editions essentially into printed matter--in the sense that the post office uses the phrase. There's nothing wrong with making lots of prints (photographic or whatever) and making unlimited numbers, if that is the choice, but it should be clear to any potential buyer now and at any time in the future that that is what you have done and that is what is being offered.
Just an opinion. Colin __________________________________________________ Do You Yahoo!? Check out Yahoo! Shopping and Yahoo! Auctions for all of your unique holiday gifts! Buy at http://shopping.yahoo.com or bid at http://auctions.yahoo.com