If you watch sports, and you want to watch sports on the go, you're going to watch to, erm, watch the WatchESPN app for Android. There's a fair bit of free video available. But connecting with your cable or satellite account opens up a world of live feeds. Basketball, golf, football, baseball — whatever, basically — you'll be able to watch a good bit of it live.
ESPN also serves up some of its original content, including individual interviews.
Closed captioning is also available should you need it — a nice accessibility option.