Hate to admit this, but I went to Wikipedia (shudder) simply because they seem to keep track of reality shows
You can see who won Food Network Star each season as you scroll through
Apparently (though wiki is not the best source) Justin's show did not go into production, but no details given. I wonder if Alton had "buyer's remorse"
Justin Warner - Wikipedia, the free encyclopedia
And yes...it would be fun to see more episodes of Good Eats. It's cooking for crying out loud...not like it goes out of style, right?