OrbLive (free, $9.99) is a great app that lets you stream any media from your Mac or PC to your iOS device, as long as both of them are connected to the Internet somewhere in the world. You simply download some free software to your desktop computer, and download the OrbLive app to your device. Then any content on your PC, whether it's live streaming TV, or music, or videos, can be streamed to your device via the Internet.