Other than for just baking, baking soda has much, much more other uses! It's a very effective cleaner and deodorizer! "The power of baking soda comes in a one-two punch: It helps regulate pH, which keeps a substance neither too acidic nor too alkaline. It also has the capacity to neutralize to retard further changes in the pH balance, known as buffering."
I like most its 'freshen sponges' function, which I have yet to try though: "To eliminate foul smell from sponges, soak them in 4 tablespoons of baking soda dissolved in a quart of warm water. Soak them overnight for a more thorough disinfecting."
Main reference and source of quoted text is today's Philippine Daily Inquirer article by Kenneth M. del Rosario, "Baking soda is home's best buddy: Best ways to use this all-in-one product for your household chores" :) I couldn't find an online link to the article so better get yourself a copy of today's Inquirer. It's on page M2, as part of the paper's Special Advertising Feature on Home Improvement. For those who can't get a copy, the article's source is the Yahoo! Green Blog. Link to Melissa Breyer's entry "40 fantastic uses for baking soda" here.
P.S. Another reference is the Arm & Hammer website.