Many of us here in this thread have done a number of these - my most recent one was in Feb/Mar this year - a business class 4-continent trip (a DONE4 ticket)

I suggest you read throught this sticky at the top of the forum http://www.flyertalk.com/forum/onewo...cket-faqs.html

There is also another Oneworld round-the-world ticket - called a Global Explorer
details of both are available on the Oneworld web site