I know this thread is from a while back, but I was doing some reading on if Jesus was an "Essene" recently, and I thought I would clear up some people's misconceptions here.
There is, in fact, no chance that Jesus was an Essene. One need only read the Dead Sea Scrolls themselves to discover this. The dominant theology of the Essenes is that of Gnosticism (i.e., the material world is bad and we must escape from it). This is in no way the theology that Jesus subscribed to, and corresponds with nothing known about him historically. In other words, no one who was an Essene would have ever said: "Thy will be done, on earth as it is in heaven". Nothing can redeem the earth in Gnosticism; it must simply be escaped from.
This also applies to two other areas: John the Baptist and the canonical gospels.
In my opinion, it's also unlikely (despite what I said before
) that John the Baptist was an Essene because he believed he had an active role in the kingdom of God coming about, whereas one of the main tenets of being an Essene was to withdraw from society and wait for God's kingdom to come by itself.
The fact that much of this other material that is in 'competition' with the canonical gospels is gnostic is also telling. The fact is,
before Constantine Christians were regularly persecuted, and to become a Martyr is completely against the tenets of the Essens. The whole point of being an Essene was to withdraw from the world powers, not to confront them and by martyred like the early Christians were (see particularly "The Martyrdom of Polycarp").
Sources: Vermes, Complete Dead Sea Scrolls; for mainline 1st century Judaism, see E.P. Sanders, Paul and Palestinian Judaism, N.T. Wright, The New Testament and the People of God; and for the whole issue: N.T. Wright, Judas and the Gospel of Jesus.