Small Business Tax Fairness and Simplification Act of 2007 - Amends the Internal Revenue Code to: (1) allow self-employed individuals to participate in cafeteria pension plans; (2) allow long-term care insurance under cafeteria plans and flexible spending arrangements; (3) allow accelerated amortization of certain intangible assets (e.g., good will) acquired from a small business; (4) increase the tax exclusion of gain from the sale of certain small business stock; (5) provide a $2,500 standard tax deduction for home business expenses; (6) permit certain small businesses to elect a taxable year ending in a month from April to November; (7) increase the allowable number of S corporation shareholders; and (8) exempt certain small businesses from withholding of tax requirements for payments made by government entities.