Podcasts are up tenfold in 2006 over 2005, according to a new research report from Forester Research's Brian Haven. The new report finds that 10 percent of individuals online in North American download a podcast at least once a month. That's up from 1 percent in 2005. Nearly half, 49 percent, of Gen X and Gen Y download podcasts at least once a week. At first blush, this number seems high if you consider podcasts as audio files downloaded only to an iPod.