This is just me spitting back info I've seen posted elsewhere, either by Tekin employees, Randy, or others:

Anywhere you can find Tekin ESCs should have them. $150 is the expected street price, so $135 after coupon codes and other promotional offers. The shorty servos are a few bucks less than the full size. Hotwire update is on the way, but getting it through the app store for Apple might take a minute for the iPhone version. Available by Christmas, if we are lucky.