Amazon on Wednesday launched the beta version of a new push-messaging service for Kindle devices called "Amazon Device Messaging," which allows apps developers and companies to send specific messages up to 6 kilobytes in size directly to individual devices, without having those devices constantly pinging back to a server ("polling"), and draining battery.

According to a company blog post, the new service is designed to allow app companies to "update customers on game play, invite them to purchase a related product, or send other messages that create a richer app experience," on the apps for Kindle devices found in Amazon's Appstore for Android. 

(H/T: Hacker News Y Combinator)