Update for those still interested.
I didn't see any exact date when it's going to be released, but you can get a key and download at MMOSite. Keep in mind, I don't think there's any place to turn in the key to activate your account, so make sure not to lose it. Also, if you don't have one already, you'll need to register a gPotato account to play.
gPotato: gPotato Game Portal
Tales Runner: TalesRunner - Landing
Downloads: Tales Runner Download
(MMOSite not linked, but they do have one here
CBT Keys: http://contest.mmosite.com/giveaway/tales_runner/