sorry about your loss. I've been to several funerals over the last year or so of close friends of mine. Left to my own thinking, i would probably conclude that there is nothing immediantly after death, but a ressurection in the distant future. So untill then, there would be nothing. But being a christian, i have to take the bible as the final answer on the subject. And while there appears to be an argument on both sides, i think the argument FOR immediant life after death is more probable.
Consider some of the apostle pauls statements. "We are confident, i say, and willing rather to be absent from the body, and to be present with the Lord." (2 Corinthians 5:8) "For i am in a strait between the two, having a desire to depart, and to be with Christ; which is far better: Nevertheless to abide in the flesh is more needful for you."(Phillipians 1:23) "For i am now ready to be offered, and the time of my departure is at hand" (2 Timothy 4:6) Jesus told the thief next to him "Truly i tell you, today you will be with me in paradise" (Even though the JW's put the comma after today, thus changing the meaning, Jesus uses this phrase "Truly i tell you" 143 (sic) times in the New Testament, and not one time does he use the word today.) He also said destroy my body, and in 3 days, I will raise it. (showing he was alive in the spirit) Jesus told the religious leaders of his day when they were debating the ressurection, "But as touching the ressurection of the dead, have you not read that which was spoken unto you by God, saying, I am the God of Abraham, and the God of Isaac, and the God of Jacob? GOD IS NOT THE GOD OF THE DEAD, BUT OF THE LIVING."
Paul also spoke of a vision he had of the third heaven, and said he did not know whether he was in the body or out of the body at the time. Some bible historians believe this happened when paul was stoned and left for dead.
Anyway, i just wanted to share this with you. As some of the other posts have said, no one has been able to come back and tell us just what happens, but of all the people who spoke on the subject, i prefer to trust someone like the apostle paul, who was in constant direct communication with God. cheers