I've just finished creating a sister site for Chordata (my RSS and Atom feed directory) named PodStack. It's a podcast directory with a useful little twist -- if you create an account, you can subscribe to podcasts and listen to them all on one page with the latest episodes always showing up at the top.

I created it because I wanted a convenient way to listen to podcasts. I'm subscribed to a few in my feed reader, but listening is cumbersome. My feed reader downloads the audio file and tells me that it was downloaded, but to listen, I have to find the file on my hard drive and open it up in a separate program.

Now I can just load a webpage and listen to anything that's new without all the navigating around and figuring out which files are the new ones.