A new search engine named Wolfram|Alpha is set to deput today.  The search engine is very much analytical in its approach to search.  Give it a day in time and it will tell you how long its been since (days, weeks, and years), the day of the week, and even, sunlight, events that happened, etc.  Enter a location (such as Grand Rapids above) and it will spit out the population, a map, current time, elevation, and weather.  If you are looking for an answer to a math question of something that has clear hard data, then Wolfram Alpha is the place to go.