* recommended videos, a feature that relies on your previous activity: favorite videos, subscribed channels
* latest from your subscriptions: 12 videos from 3 of your subscribed channels
* friend activity: a list of videos uploaded, favorited or rated by your YouTube contacts. This information is displayed only if your contacts added it to their public profiles.
* inbox: messages, friend invites, received videos.
* statistics about your videos (total views, subscribers) and your activity (subscriptions, comments).
"The goal with all of this is to gauge people's interest in having a YouTube that's tailored to the individual. Ultimately, we want to get you one step closer to the videos you'll enjoy most every time you come to the site," explains YouTube.
To try the new homepage, log in to your YouTube account and then go to http://www.youtube.com/iyt.