Randy Alcorn answers this question from a student. This video clip was excerpted from Randy's Eternity 101 DVD class.

Let me start with what Heaven won’t be: boring. It is not a place where we will be ghosts or angels endlessly floating around on clouds, strumming harps, and wishing we’d brought a magazine.

Randy Alcorn discusses the topic of Heaven on the Janet Mefferd Show. March 2010.

I believe the New Jerusalem is right now in the present (intermediary) Heaven because of my understanding of Revelation 10.

In Revelation 22, those who are outside the city mean those who are outside the city in Hell.

Despite my best attempts to be careful with Scripture, my understanding is far from complete and is without doubt incorrect in some areas. But if the reader diligently investigates the Scripture passages referred to in this summary, he may discover to his surprise (and either to his delight or discomfort) that some of his own notions and assumptions about heaven are in fact not biblical. In the process, he will gain a far greater understanding of this vital subject.