My wife and I have been doing the running thing and it has been pretty fun. She just received her new droid x yesterday, and I downloaded runkeeper. This is a great program! It tracks your calories burned (est.), speed, time, distance, and maps it out. When you are done it saves it to their server, so when you go home and login to the runkeeper website, all the data is there and shows the map of your run! I just downloaded the free version, but there is a pro version also. Not sure what the differences are yet though.

Check this app out if you are a runner. It also works for cycling and other sports too!