Resistor is now on sale in the XBox Live Indie Game Marketplace. Try the trail version for free, and if you like it all 90 levels can be unlocked for $1 (80 Microsoft Points).
From the XBox dashboard, go to Games > Browse Games > Indie > A-Z > R > Resistor
You can also find Resistor in the Puzzle & Trivia Genre section
Thanks to everyone for following the development of Resistor!