Remilard is correct. We discussed this at our local homebrew club meeting last night. One of our members is a commercial brewer and he agreed to sponsor someone for the gabf ProAm. The requirement is threefold, the beer has to have won at an AHA sanctioned competition, has to be brewed by an AHA member and has to be (or have been) commercially available.
In our case, we have a few members are are going to brew up some batches and enter them in a contest that is coming up shortly. If they win, they will brew up a batch to be sold at the brewpub and move forward with the ProAm.