No one knows more about using the new Real-Time tools and strategies to spread ideas, influence minds and build business than David Meerman Scott. He's a marketing strategist, speaker, advisor to emerging companies, and author of ten books including three international bestsellers.
I love this video called The Chase created by Intel to build excitement around the 2nd Generation Intel® Core™ i5 processor.
The reason this works for me, and why it has nearly 2 million views, is that it shows (rather than tells) what the product can do for the buyer persona who uses social web applications. Brilliant stuff.