Yeah I think you're right. Darn.
I thought it would carried on through the whole season. In fact, that's what they told us on the blog when it was started.
We're rolling out a new feature for Tales of Monkey Island today: Treasure Hunting! Until the end of the season, we'll be releasing maps on various locations on the web, which can be used within Tales of Monkey Island to uncover some cool Monkey Island extras.