Andrew, you are clearly a visionary person, and the world needs those. However, when you create a product, you should carry through to make it stable. There are not a lot of products out there like Dolphin. If you would get the bugs out of it and clean it up, the product would take off. People would start writing some great plug-ins for it (instead of just mods to fix the bugs), and more and more people would use it. The product would not become obsolete because the developers would keep up see more with the market trends for it.

For .5 million in one year, you could have the best programmers working on this product and make it first class. As the others have said, your idea is fine, but concentrate on fixing your product. Or sell it to someone who will fix it.