Well personally that doesn't sound like an interesting project to me. It's been done before and unless you have some radical ideas it's not a very challenging task. Plus it looks very comercial and for me to work on something comercial it would have to be a paying gig.
I program all day long in PHP for my work, and to take on a side project it would either have to be very worth my while financially, or it would have to be an extreemly interesting/challenging project.
I hope you find the help you're looking for and if you have any problems/questions feel free to ask.