The "for ever and ever" is the english version. The word used in the early manuscripts literally means an "age." An age is a time period with a specific begining and a specific end.

The Bible also states:

1.) God's will shall stand and he will do all his pleasure
2.) God wills that all men will be saved
3.) Thus all people will be saved

I find the notion of Free Will to have relatively little to no Biblical standing. In fact the only Christian scripture in which the term "free will" applies is in a later apocrypha which was never considered for canonization.

Also:

1.) If you believe that Jesus is God and follow him then you will be saved
2.) No man can say that Jesus is God but through the Holy Spirit
3.) All people above the earth on the earth and below the earth will confess that Jesus is God.
4.) Thus all will be saved

There is also the Lake of Fire which combines the two elements which are used as symbols of purification throughout the entire Bible (fire and water) The Bible also says that a mans work may burn, but he himself will be saved through fire.

Finally, there is also a very popular Christian apocrypha which was on the early list for canonization which states that all men will eventually be saved and brought out of the lake of fire (Apocalypse of Peter). As well as a Gospel (I'm not sure which off the top of my head, the Gospel of Thomas perhaps?) in which Jesus states that all will eventually be saved, but he tells Thomas to keep it secret least everyone find out about it and sin under the impression that they will recieve impunity for it. (While all will come to God, the Bible also mentions a loss that the unbelievers shall suffer).