Um, you can't really do this. Confluence is a wiki. Sharepoint is a document repository and handling system, not a wiki.
If you want to switch from one to the other, then you need to go through a proper planning and training process - decide what you're aiming for, then look at what you've got now. Your migration plan will depend entirely upon that.
You might like to know Clearvision has developed several tools to migrate from Sharepoint to Confluence. Presently we offer this as a consulting service. As from September 2012 we will have a download licensed tool on offer. If you are interested, contact firstname.lastname@example.org
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