Web development project - doc sharing platform

We would be glad to boost the portfolio of anyone capable of completing this 'doctastic' development to an all-inspiring standard:

Your objective is to develop a scalable document-sharing platform where ultimately users can buy and sell documents, using the very best skills you have at your programming arsenal.
The project overview is attached for your attention.

Generally, to get this project completed within our preferred timescale of 1 month we think this is a two man job, however we're open to bids from (and flexible on budget for) individuals who are confident they can have the website completed within 2-3 months.

You should have a sharp eye for details, as you will be provided with the photoshop design files to scour through and work your coding magic.

Some attractive skills we're looking for are:
- Sprites programming (for fast loading effects)
- Ajax/jQuery (for same-page loading; horizontal item scrolling within page elements; expandable/collapsible menu descriptions, e.g. FAQs)
- MySQL Database
- Payment Gateways

Our Ideal programmer:
- Ruby or PHP expert
- Excellent English communicator

To really stand out from the bidding crowd, you could provide three examples of user-interactive websites that you think provide an awesome user experience in terms of design, flow and execution of functionality. Of course, awesome examples of your own previous work similar to this development would be even better.

Would be happy to discuss further with all interested and enthusiastic candidates.

Thanks for viewing this posting and the best of luck.