This is not just another indie games bundle, it's somewhat different.
First off, these games are not re-releases of commercial indie games. They were exclusively created for the bundle within just a few months, and everyone who met the deadline could add their own game to the package.
They're based on the Adventure Game Creator by Chris Jones, the engine that was also used for games like Gemini Rue, the Blackwell series etc. But contrary to the latter these games are all amateur productions by more or less experienced AGS community members, made just for fun; the stuff you usually get for free
over here. That doesn't necessarily mean they're "crap"; there are lots of great freeware adventures around that were made with AGS. Of course, chances are that open minded fans of the point-and-click genre and admirers of pixel art and amateur creativity already know about this, while others might have no interest in these games. But keep in mind, you're not really paying for the games but to support the AGS freeware community (in spirit) and Child's Play (financially).
That being said, I'm going to get me a copy tomorrow. :) (I'm especially curious about the new works of ThreeOhFour, Technocrat and Grundislav.)