I figured I'd repost this for everyone's benefit. Good Eats: The Early Years covers Season 1 through just over half of Season 6 (up through the episode called "Casserole Over").
You can find episode lists either here on the Food Network or here on Wikipedia.
Also, at the top of the blog is a page called "Good Eats Resources". You can find a link to the episode list on the Food Network there as well as a link to a Good Eats fan site that has transcripts for all Good Eats episodes.