This whole 'third heaven' thing may warrant its own thread. However, why start a new thread when you can derail an existing one!
Paul wrote of 'a man' (likely himself) who saw the third heaven, and saw things of which he was not permitted to speak. I've heard that the 'third heaven' was simply 'heaven' - the realm of God (the first is the atmosphere, the second is outer space).
I also thought that, in Christ, we don't get to go to the third heaven, but we do get to live on the new Earth. I'll have to check Revelation when I have a few minutes.