Remember that first-ever portable HD Radio prototype we peeked back in May? Turns out Best Buy just let loose the real-deal, today announcing immediate availability of the Insignia NS-HD01. Needless to say, the big box retailer and supporters of HD Radio alike are hoping that this subscription-free player will finally put some much-needed wind behind the sails of the format, and while it's pretty simple in nature, the sub-$50 price tag could place it squarely in the "impulse buy" category. The relatively brief specs list includes a color LCD, rechargeable Li-ion battery, a 3.5 millimeter headphone jack, a bundled armband and ten user-selectable preset memory channels. You can catch t
