Thanks for the suggestion. The website is long overdue for a frontend overhaul, but I'm not really that good at frontend design. I also am rather busy with my other projects at the moment, so I don't have the time to improve this one. At the moment it's functioning quite well by itself.
If you allow me I could design a rough template for a new site and share it with you. As already mentioned, this project has great potential and all it really needs to grow is more available work, which can be solved by using different language and terminology on the landing page. I can do that for you.
Jorijnsmit, I think it needs more than that; if you're aiming for average bitcoin-joe-on-the-street to be able to use vanity addresses, even copying and pasting the private key into a website/app key-import text box might be more trouble than they'd be comfortable with. Certainly if they generated the key on a website then had to import it into a phone app (or any other device), or the other way round. The ideal would be a point-and-click interface to "download" the key and apply it. There's no mime-type or file format or filename-type-extension set up for that, and no apps I'm aware of have considered to make it easy enough to do anything like that. Because of the low demand for usage of that kind of feature, I think - bit of a chicken and egg type problem.