The iTunes App Store offers SlingPlayer for iPhone / iPod touch or iPad for $14.99. That's $15 off and the first time we've seen this app discounted. When paired with either a Slingbox SOLO or PRO-HD (earlier models aren't supported), it allows you to stream your home TV across the Internet (via 3G, 4G, or WiFi) to an iPhone, iPod touch, or iPad.

Update: Of note, Amazon has it for the Kindle Fire for the same price.

Update 2: Google Play also offers it for Android devices for the same price.