In case that iPod you got for Christmas didn’t satisfy your need for electronics, check this out – Mileage Plus members can earn a free BlackBerry handheld with the activation of a new T-Mobile account and a paid qualifying roundtrip flight of $250 or more on United Airlines.

Sign up for the data-only service plan and get the BlackBerry 6230, or sign up for the voice and data plan and receive the BlackBerry 7230. The offer is valid through March 31 for travel by April 30. Visit http://www.united.com for details and registration.

Then again, if you plan on staying earthbound for a while, Avis is offering something similar for a little less. Receive a free BlackBerry after one completed rental with Avis. You have to pay a $35 activation fee and commit to a 12-month service plan, but you’ll get an $85 mail-in rebate with the BlackBerry device. The offer is valid on completed rentals until March 31. You must register at http://www.avisawards.com to qualify, and you will be required to pay shipping and handling and applicable taxes.