Warning:  Don't click here unless you have at least 30 minutes to kill.  Hit Tracker is a home run playground.  Stolen from their own page:

"Hit Tracker is a spreadsheet tool that takes as inputs atmospheric information and observation data, and gives as an output the true distance that the home run traveled, along with the initial speed of the hit off the bat and the precise angles at which the ball left the bat. It does this by creating as a starting point an initial "best-guess" three dimensional trajectory for the home run, and then modifying that trajectory, a little bit at a time, until the trajectory matches the observed data from the actual home run event."

Is this new?  Am I the last to know about it?  Anyway, it has links to the videos of the home run, breaks them down into 3 different types (just enough, plenty, and no-doubters), has ballpark specific shots, player specific shots, and keeps track of various HR awards on the main page.

Want to see how far Hafner's HR in Tampa Bay earlier this year went, or watch a video of it? You can also learn who holds the Golden Sledgehammer title, or why Brandon Phillips leads a category.  Step right up and buy one today!

Baseball's great, isn't it?