Wolfram Alpha launched this past weekend. Though it has its quirks, it is notable as a new type of "computational knowledge" search engine. For RPG players who like to crunch numbers and science, especially with a game like
Eclipse Phase, it has some interesting potential.
For example, let's say you've set your personal
Eclipse Phase game in the year 2100, and you need to know what day of the week May 17th falls on. Enter "May 17, 2100" and Wolfram Alpha tells you it's Monday, among other details.
Let's say your character wants to egocast (transmit their uploaded mind) between Mars and Europa on this date. Well, how far do these two happen to be apart on that date? Enter "distance between mars and europa may 17, 2100" and Wolfram Alpha tells you they are about 5.075 AU, or 42.21 light minutes apart. So that egocast is going to take ~42 minutes.
That's just getting started. Here are some other interesting uses: