Hej,
that we use them in commercial project doesn't mean that you cannot use them 
It means that we don't consider them "usable", yet. We have them running under extreme conditions, but the boards are not easy to manufacture, or still to expensive. Therefore we haven't published them, because we don't want to be giving poor support to 10-15 different designs. We prefer to give excellent support to 5-6 good designs.
Everything we publish is open source, and if we publish a shield on the site, it will also be open source, no doubt about it!!
On the other hand, we use Eagle as software for developing the boards. Eagle has been developed by Cadsoft: www.cadsoft.de, and it is available as freeware for Mac, Linux, and Windows. The .brd format is the board, while the .sch is the schematic for the design.
/David
PS. Another reason for not building some boards is obviously an economical one. For example, according to the quotes we get from different providers, a Bluetooth board would never have a reasonable price under 90Euros unless we manufacture 1000. But for building 1000 we need a start-up capital of 15.000 Euros. guess you can understand that as an open hardware project that is NOT making money on selling hardware we don't have 15.000 Euros to invest.