OK, I've been away a while - interesting discussion in the meantime!
I personally am a somewhat liberal Episcopalian. So I'm not committed to the actual factuality of many of the miracles attributed to Jesus. I'm not committed to thinking they didn't happen, either.
The point is not whether they happened, but what they tell us. Biblical literalism has the major drawback of reducing these miracles to supposed proofs of Jesus' divinity, which then invites precisely the kind of conversation we have here, the suggestion that they were "merely" magic tricks. Either perspective has at its base the assumption that whatever Jesus was up to, he was trying to draw attention to himself.
But if you throw out biblical literalism, or at least suspend it or look deeper than a superficial reading (i.e., about mere facts), then you can find more interesting and still relevant truths. The feeding of the multitudes, for example, are Eucharistic stories. The raising of Lazarus points to Jesus as the source of life - life that has less to do with whether one has a pulse, and more to do with the Reign of God. Of course, there's much more to each story - it's not a one-to-one ratio of story and meaning.
The way I see it, the story of Jesus must begin with the Crucifixion. I find it highly unlikely that a crucifixion could be a staged event with the cooperation of the Romans, simply because of what crucifixion was about. It wasn't just a way of executing criminals - it was reserved for a certain kind of criminal: political insurrectionists, and others such as slaves who dared to try to rise above their station. The "thieves" crucified with Jesus weren't thieves, they were "bandits," a term the Romans applied to rebels or insurrectionists. Crucifixion was actually a mock enthronement - a parodic exaltation. The mockery recorded in the Gospel accounts was actually commonplace.
So when Jesus' followers found him arrested and killed in this manner, as a failed insurrectionist, they probably should have renounced him and turned their attention to other pursuits. In fact, there are some hints in the Gospels that they did just that - returned to fishing, for example. They seemed to have given up hope. Jesus couldn't possibly have been the expected Messiah, because he died. At any rate, the disciples didn't simply pick a new leader or attach themselves to a new charismatic figure in a revolutionary movement, as one might expect.
So what is the Resurrection about? However it's interpreted, it became a new interpretive lens for Jesus' life, ministry, and death. The New Testament is all about reinterpreting Jesus, an executed political rebel, in the light of the Resurrection. The NT isn't all of one mind about it, either. If all of this were a planned trick of some sort, the NT would be a lot more homogenous in its interpretation and proclamation of Jesus. Ironically, if you insist on biblical inerrancy, which tends to lead to attempts to harmonize all the different writings into one single theology, you play into the hands of those who would dismiss the accounts as a sort of conspiracy. But an honest and critical examination of the text shows a remarkable diversity of understandings of what Jesus was all about, as well as development over time. People were really wrestling to make sense out of their experiences of Jesus. But everything in the New Testament should be read through the lenses of the tragic and puzzling execution of Jesus, who people thought would be the Messiah, and his subsequent resurrection, however that might be interpreted. The subsequent proclamation by the disciples had to deal squarely with the very public fact of Jesus' execution. The fact that the Gospels each devote so much ink to that single event only highlights its importance - that it was an unexpected event that had to be reckoned with. We're actually still wrestling with it, as we've been for 2000 years. There is no one single Christian understanding of what Jesus' death was about.
A side-note: I can't remember who suggested a few pages back that if Jesus died, or seemed to die, then came back to life, and died again some time later, then all parties could be happy. Actually, that's not true. The whole point of the Resurrection, for many Christians who take it literally and Christians who don't, is that it represents Jesus' triumph over, and in fact destruction of, death. St. Paul's description of Jesus as the "first-born from the dead" also implies that in Jesus, we see the destiny of all of us who die - so the Resurrection shows us what we will also become. It wasn't simply another trick to prove Jesus' divinity. It's probably more about his humanity, in fact. But, as with everything else, not all Christians will agree on this meaning and there may be some who would be happy with the idea that he merely came back to life only to die again later - but I've never met any. St. Paul also wrote (and the more catholic churches tend to use this in their liturgy through the Easter season, in the Pascha nostrum) that "Christ, being raised from the dead will never die again; death no longer has dominion over him." So in order to believe that Jesus merely returned only to die again, you have to be willing to throw out at least the Pauline corpus, if not most of the New Testament, which tends to interpret the resurrection along similar lines.