Income averaging is allowed for farmers and commerical fisherman (Pub 225). Other forms of averaging related to self-employment were repealed in 1986. Refer to Tax Topic 412 - Lump Sum Distributions (2011) for a related discussion concerning one-time distributions from a qualified retirement plan.
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Pursuant to the requirements of the Internal Revenue Service Circular 230, we inform you that, to the extent any advice relating to a Federal tax issue is contained in this communication, including in any attachments, it was not written or intended to be used, and cannot be used, for the purpose of (a) avoiding any tax related penalties that may be imposed on you or any other person under the Internal Revenue Code, or (b) promoting, marketing or recommending to another person any transaction or matter addressed in this communication.