For anyone that has already bought the Humble Indie Bundle #2, you now get all of the original HIB #1 games too. For anyone still purchasing the HIB #2, as long as you pay more than $7.32 USD for the bundle, you too will get all of the original titles as well. There's still three days and ten hours left (at the time of this article being published) to participate in this offer.
The original HIB titles include World of Goo, Aquaria, Gish, Lugaru HD, Penumbra Overture, and as a bonus there's another game too, Samorost 2. The original games were open-sourced when the first Humble Indie Bundle broke the million dollar mark, but it's unknown if any of these second bundle games will too be open-sourced. The Humble Indie Bundle #2 games include Braid, Cortex Command, Machinarum, Osmos, and Revenge of the Titans.
Those interested in participating or learning more can visit HumbleBundle.com. At the time of posting, the HIB #2 has brought in $1,329,427 USD from 181,543 sales. The average Windows user is paying just $6.16 USD for this collection of indie games while the Linux user on average is paying more than double that, at $13.49.