If you're looking for the QuickBooks rubygem, you can find it here. That project has a more complete object interface to QB. It is a closed source alternative.
Currently is a an object interface written in the Ruby programming language to interface with QuickBooks. At some point in time, I would like to have some completed tools that can general be used with websites and QuickBooks.
At this point in time. The basic interface is written with some extra methods written to help automate lookup and creation methods in QuickBooks. It current only works on a local version of QuickBooks (aka on the same machine as the Ruby code). I have only really tested it on the premier version of QuickBooks.
It also contains some programs that use the interface for downloading orders from a website, uploading inventory to a website, and download part (item inventory) from a website. This code could be used by a programmer to help them develope a customer solution for a customer.
As I am just getting this project up, please be patient while I get all of the sections setup. If you would like to help out with this project, please contact me through the forums.