Netflix vs. Blockbuster: What's the best service for streaming and DVDs?

Netflix and Blockbuster are still the only major services that offer discs by mail and online streaming. How do they compare? And what about competitors like Vudu, iTunes, and Hulu Plus?<img src="http://feeds.feedburner.com/~r/cnet/tcoc/~4/nCFN1D82UJY" height="1" width="1"/> [More]