Dear Gumby:
I have a different understanding of this than most.. I think that when Jesus referred to 'ascending to the heavens' ,. he was talking about a higher level of spirituality.. Take this scripture for example:
John 14:23 >>.....If anyone loves me, he will observe my word, and my Father will love him, and we shall come to him and make our abode with him.
The whole chapter of John 14 talks of Jesus sending the holy spirit down after he dies, which happened at Pentecost 33ce. So this would something new, that hadn't happened yet.. So, evidently the spirit of God would have a more profound effect on the person than the spirit had on people before.
John the Baptist had died before Pentecost 33ce and therefore, Jesus could say that John had not ascended to the heavens.
Most think that heaven is the realm in the spirit world, where the angels and God are.. but it is actually IMO, the place with God. Which could be as a spirit or a human.