HarperCollins Children's Books has a neat feature on their website: Author podcasts! Right now, Tim Green is featured. In the podcast, he talks about his book Baseball Great. Previous featured authors include Jerry Spinelli, Lemony Snicket, Katherine Hannigan, Peter Abrahams, Neil Gaiman, Sarah Prineas, Gail Carson Levine, Nancy Yi Fan, and more
While you're there, check out the other features on the HarperCollins site. You can sign up for a newsletter and to read soon-to-be released books before they are released. There is lots of information on HarperCollins authors, games and contests and a bookfinder, too.