Dish Network to extend free Sling Adapter (after rebate) offer to existing customers

Dish Networks recently revealed a promotion involving free Sling Adapters for new customers, but now Scott Greczkowski of SatelliteGuys.us reports they will also be available to existing customers after May 18th. The Sling Adapter will cost $99 up front, with a rebate for the same amount coming back as an AmEx gift card. That's a nice treat for all those still looking to add some Sling capabilities to their 722 DVRs, and apparently it's a response to customer feedback. Check the forum for all the details, but we're pretty sure "free" (even after rebate) is really all the detail necessary.