Hey, maybe I'd do this just for fun & contributing to a really good project! Can't believe that there are so few serious reactions. If I'd actually get paid for, this would of course raise my motivation greatly and I'm even open to travel currently to meet / discuss / do things from person to person if liked.
I'm very experienced in Photoshop and web design. HTML, CSS, PHP etc. skills would need to be refreshed, but I've written pretty complex programs before (one project was a hobbyist operating system, and I've worked on a billing software for doctors in Qt/C++ - the company was called Philosoft - Switzerland, maybe I'll find something of them), unfortunately I don't have backups of most of my work and I'm not currently employed so I don't have actual references.
I'll post a submission though in the next days, if it's still wanted.