As I understand it, the listing will not be automatic and there will be some review done. Here are a few tips that will assure your podcast gets listed promptly.
Make sure that your RSS feed is valid and has no errors. Make sure all of your album art is linked in correctly. If your RSS feed does not have album art you likely will not get listed. It is my understanding that each show is going to reviewed. While I am not sure if they will be looking at your website, I would not be surprised if they do.
The Zune team has worked hard to make up for lost time. I would hope that the podcasting community will welcome them with open arms and help promote the Zune Product line. They are being very pro-active and I am excited to welcome them to the space. Zune Insider
Note: If your show covers or approaches these topics don’t plan on getting approved as shows with porn, hate talk and or illegal stuff will not get listed.