This is currently git-backed but could be expanded upon to not need git. The idea is to use a standard BOM and a sort of manifest file to easily make a page from which you can download the Gerbers and put the parts into your Digikey/Mouser/Farnell etc. shopping carts with a single click.
Check it out at
kitnic.it and please let me know any thoughts or questions. Would love to help people get their projects up on the site. Kitnic itself is open source too and the code is shared on GitHub.