I can see what you are trying to achieve but I worry that you are concentrating so much on the technical excellence that you will miss the usability.
You are competing with products such as Photomatix which have a very easy to understand UI and produce excellent/very good results out of the box - your algorithms may be superior but unless you wrap it in a UI that is easy to use and understand then you may limit your audience to just a handful of people who want to take the time to really get into the 'nth' degree of HDR - whereas 99% of the audience may be happy to use something like Photomatix that produces an 'acceptable' result most of the time.
Thanks for the feedback. I do agree that we have work to do on the user-friendliness, and we'll address that in steps. It can't be a super-easy program in the end though, because then we lose the "photographer in control" concept. We don't aim to be the number 1 selling HDR software. Finding our users will indeed be a challenge still. I don't really know how to do that in the best way, I'll think about that. Our intention is to start slow though, to not get a flood of users in the beginning, so we can give good personal support in this early phase where support is more likely to be needed.
Lumariver HDR is not the software one would use to get that cool HDR look one found in a picture on the web. It's a tool for a fine art photographer relatively experienced in post-processing that wants greater control when merging and tonemapping comes into play.
It's also for the technical photographer. There's really no established HDR software out there that can give you a merged raw or even TIFF that has the exact same linearity as the darkest raw in the set, there's always some hidden modifications going on. I had this problem when I was merging for reproduction photography. With Lumariver HDR you can do this.
There are few tonemappers out there I would use to make a fine art print that should look great rather than dated in 20 years. Lumariver HDR is for example an excellent choice if you like to do your fine-art post-processing manually in photoshop but need some added support by tonemappers. You can then bring this in from Lumariver HDR and as it produces neutral luminance maps they're easy to understand and further edit. We want the results from Lumariver HDR to feel open rather than mystical, so when you send your finished image to the printer you feel that you made the image to what it is from start to end.
With the import/export capabilities and multiple formats there are surely workflows you can have which we have not really thought about yet too.
We'll always focus on image quality. Sure we want to have algorithms faster than glacial, but we won't make realtime algorithms if we can get better results out of slower algorithms. We just need to find users that share the same desire of features that we do, it will probably be a quite small user group as you say though. If you want to reach the largest user group the program should have an entirely different focus, but we felt that in the HDR segment this is already well covered.