Facebook adds features, plus enable your Timeline now!

At F8, the Facebook developer conference, Facebook announced some major changes to the service - this on top of the new Top Stories arrangement from a couple of days ago, which most people found took some getting used to.

So what's coming soon?

• Timeline - The Profile page will soon be replaced by a Timeline, which will provide easier access to past activity (including Status Posts). You can also add pictures, notes etc and place them on your Timeline after the fact - even before you started to use Facebook (all the way back to baby pictures, if you like). The Timeline will become like an online scrapbook of one's life. If you want to get a head start on this change, you can enable your Timeline now and get busy uploading those baby pictures. Also, Mashable's Ben Parr went in depth with the new Facebook Timeline.
• Gestures - developers can create buttons similar to the Like button, but for any action directed to any particular entity. For example, you might visit a book publisher's site, and the product page for a particular book might have a button you can click to tell Facebook (and the world) that you're Reading that book.
• apps only need to ask once to share stories on your behalf - as part of Facebook's new Open Graph, Web sites that get your permission to share a story on your Ticker don't need to ask permission when you visit the site again - they can just share automatically.
• "lightweight" information will be shared on the Ticker, not the News Feed - the News Feed will contain important updates, like Friends' status updates, changes in relationship status, and the like. Less-important information like shared stories, Farmville, etc will be relegated to the Ticker, has already been added as part of the recent changes.
• Watch TV shows, listen to music, etc with friends thanks to new FB partners - Facebook has partnered with Hulu, Spotify, and others to allow users to watch TV shows, listen to music without leaving Facebook. These activities will appear in the Ticker too. You might notice that your friends are watching a show you've been meaning to catch, and start watching it "with them" directly from Facebook.

Big changes! For the 800 million of us already on Facebook, some of these are going to be a pretty big deal.