Error 503 Service Unavailable
CAM file makes the gerber files needed for different PCB fab companies. Uploading just a .brd file to OSH Park is not on his instructions for uploading.
We are currently processing uploaded files with Eagle CAD version 6.2.1 and has been tested with Eagle CAD files through 6.3. If you are using a newer version than 6.3 then please contact us, or generate your own gerber files.
How to submit your orderFirst, try uploading the board at OSH Park as either an Eagle .brd or a set of Gerbers.
If you only send gerbers and not the source files (.sch, .brd) you protect your design a little as well.