Step 2: Assemble the frame
When glueing, make sure that the glue does drip anywhere. If it does, wipe it off and then lightly sand the area to remove any traces of the glue. The traces of glue could mess up the wood stain in a later step, and it's better to be safe here.
In addition to cutting materials, ponoko allows you to engrave your designs. In the second photo, you can see a small logo that I had engraved into the base.