In a note to clients today, Piper Jaffray analyst Gene Munster unveiled his semi-annual survey of teen buying habits and found that "Apple's dominance in the [consumer electronics] and online music markets is going seemingly unchecked."

As noted by "Fortune" (http://brainstormtech.blogs.fortune.cnn.com/2010/04/12/survey-31-of-u-s-...), Munster says:

° 31% of the U.S. teens surveyed planned to buy an iPhone in the next six months, up from 22% last fall and nearly double the 16% who wanted one a year ago.

° 14% already own an iPhone, up from 8% a year ago, but down a point from 15% six months ago.

° Of the 87% who own an MP3 player, 92% own an iPod. Of Apple's major competitors, only Microsoft, Sony and Sandisk showed up in the results, with 3% market share each.

° Of the 82% of teens who download music, 43% do it legally. Of those, 92% get their music from Apple's iTunes Store.