We took a look at the Timebits time tracking app a few months ago, and found that the program wasn’t quite up to snuff for folks serious about the detailed tracking and analysis of their time. Since then, other options have began to appear in the time tracking space, and TimeTracker Full ($9.99 in the App Catalog) does an excellent job of tracking your time and logging your data, all while automatically starting tasks by WiFi SSID or GPS location.
Freelancers: be excited.