Using my IRA account at Fidelity, I purchased $5,000 worth of TIPS at last week's auction by the Treasury Department. Normally, I would have executed the order online and would not have incurred any commission. Because I was travelling and unable to trade securely online, I called Fidelity and did the trade with a broker. As usual, Fidelity came through with good customer service. Aware of my situation, they agreed to waive the commission.
Ultimately, I plan to purchase a total of $25,000 in Treasury Income Protected Securities in a 5 year ladder for my IRA. With all the income tax deferred, the IRA is the best place for "income" investments for most investors.