How do people get the timeline thing on Facebook?

[â—‹-Miss Em-â—‹]

Some people's profiles have a "timeline" and their whole profile layout is different. Is that an app that they have or an update to Facebook that everyone will get eventually?
Is there any way I could update it, and then take it off if I change my mind?

Also, where/how do I update it?

[Play]

yes. you just have to update it. but i think you rather don't do it. because it makes your computer slow and lag.

[ohemgee]

Click the green button in the bottom right. It does not make your computer lag, My computer is so slow it makes a snail crawling through chunky peanut-butter look like a nascar driver, but facebook still loads like usual.

http://www.facebook.com/about/timeline

- If you update it, you will only get it sooner, everyone is getting it. It will become the new facebook. Either way there is no going back to the old one.

[abraXus]

if you update it, you wont be able to take it off