Wolfram|Alpha, the computational knowledge engine from Wolfram Research based on Mathematica has been online for two years. With its curated data, ability to compute answers (rather than lookup links to web-pages) and visualize results it is a very powerful tool. It’s app on the iPad brings this power to visualize data and create insight straight to your fingertips:

Check out this webinar by Stephen Wolfram to learn about the new features and how this new tool is being used in a variety of domains:
Wolfram|Alpha Blog : Wolfram|Alpha: The Second Anniversary.