I was just reading this great feature on Gamesutra.com, and thought you might enjoy it as well.

And neither does Brad Wardell at Stardock who ships -- and will continue to ship -- his retail DVDs to stores without DRM. The only validation required of customers is when they go online to update the game they purchased.

However, Stardock has developed a relaxed version of DRM, called Goo (no relation to World of Goo), that it licenses to interested parties. The first company to make use of it was THQ on its Tales of Valor, the recently-released stand-alone expansion of Company of Heroes.