I rarely ever use Google Latitude, although I do use Foursquare, so when Google announces new changes to Google Latitude, I am not always a 100% sure what is new and what is not.

Daniel from Google announced this in the Google Maps Forum the other day, saying Google Latitude users have a new home on their desktop at google.com/latitude. He said the new features include:

Check out the new way to access your friends list, personal location history, and more.
Manually update your location from a computer by pressing ‘Update’ next to your name
In Location History, playback your location history from a select range of dates by pressing the play button on the bottom left hand corner of the map

Here are screen shots:

Forum discussion at Google Maps Forum.