Everyone can now sign up to get two (2) free $40 coupons to use toward the purchase of a digital TV tuner.
https://www.ntiadtv.gov/The tuners I have found that qualify for the $40 discount are not the best but they will work for a bedroom or guest room TV since they don't have 5.1 digital output, no SVIDEO or HDMI output, and only 480i resolution.
Wal-Mart has converter boxes for $50 so your out of pocket is only $10.
I have used a Samsung SIR-T151 for a few years and am spoiled by the PQ of DTV. No ghosting or compression artifacts with over the air digital signals and clean 5.1 digital sound. I plan to give the two boxes I get to a couple friends that have no interest in digital or surround stuff, they just want a working TV.