I agree that those who believed what Philip was preaching were saved. In Acts 8,you find this verse:
12 But when they believed Philip preaching the things concerning the kingdom of God, and the name of Jesus Christ, they were baptized, both men and women.
As you can see, they were baptized. Baptism is for the remission of sins(Acts 2:38), and since it has yet to be proven that remission (or forgiveness) of sins is not necessary to be saved, I feel this only supports what I have been saying all along.