I would to own a free-of-charge website (but I pay you here to develop it, of course) where service buyers like me can submit their project once and have it automatically published on all the (10~15) biggest freelancers sites like Getafreelancer, Elance, Guru, Rentacoder, Scriptlance, and so on..
I already filtered out these (10~15) biggest freelancers sites.
This website will be hosted by me, and you (the author) will keep only the unlimited free-of-charge use of it like others, for life.
To manage the diversity of the category structures I think that the best would be to clone/use only the category structure and names of the site that have the biggest number of them, and manually set in your program the correspondences to the categories of all the other (10~15) sites. You are free to suggest a better method.
The submission engine and the interface must support the addition of a text header and/or footer to the project description for specific freelancers sites only, selected in a checkbox list.
To keep the service easy and fast, the interface has to ask username and password only once: the same username and password will be (automatically) used for the submission to all the freelancers sites.
The submission engine must have an error check on the results of the submission for all the freelancers sites.
Ie. after the user press the "SUBMIT" button, it will be returned to him a results page that inform him on the results of the automatic submission for all the freelancers sites. (Ex.: Getafreelancer: OK. Elance: failed. Guru: OK. And so on for the others...).
The interface must be well designed and the submission engine must be well coded, with comments and the right smart flexibility for the error check I decribed above.
I'm open to suggestions and to pay you for improvements on this project. I would prefer a long term relationship.
I escrow the entire payment immediately after I award the winner and he accepts. You can bid with full confidence.