http://pspdfkit.com/
2. Why would I need one of these? As a customer I had to think for a while to realize that this would really help if I was distributing content, like an article or magazine, converted to a digital format. I'm sure there are plenty of other use-cases. But that's not something I want to have to convince myself about. You should be the one telling me all the cool ways I can use it. A video showcasing how it works would be superb.
3. The name. You're probably already invested into it at this point, but there's a very low chance I'm going to remember it.
4. The price might be a tad high. The more important point here is: this isn't like a $0.99 app; you're probably not going to get sales in the immediate future. At this point I'd start aiming at companies that can use your product, reaching out to them and trying to do some old-fashioned salesmanship. Expecting people to come to your page blind and make a purchase of that size is a bit... much.
Best of luck, it certainly looks like a very neat piece of middleware!
1) I think the price tiers may be a little high. Independent developers even bitch about the $99 Apple developer account fee. You need to make binary release a little more accessible.
2) This may not be in your scope, but I could have REALLY used a nice library to generate PDF's. I don't know if you are attacking that but I would definitely use it.