Man, those are some freaking tricky puzzles.. glad I'm good at finding things on the internet (IE: Answers that other people have come up with... )
Reward pic:
http://ourcolony.net/thesecret/1426.jpg
Man, I hope that's a screen shot from in game. Wowzahs.
Clue: "Ready for more secrets?"
Answer: There were apparently a bunch of hidden images that made up a puzzle with the clue "Stella's Peddler. Imagine if he'd had one of these" written on the side of the car in the above pic, which implied it was either the seller of "stella" or someone who sold to "stella"
Our piece of the puzzle was:
http://ourcolony.net/images/challenges/863.jpg , which could be found by looking at the source the page and correcting the slashes in the link.. they had used backslashes instead of forward.
From another group's site, I found this post:
Stella
The in-house name for the Atari VCS while it was in development. Named after a bicycle owned by one of the Atari 2600's creators, Joe Decuir. Stella is also the name of an Atari 2600 emulator that has been ported to just about every modern-day operating system
"Joe Decuir" was CEO of Atari.