I listen to a lot of podcasts -- they're a convenient way to absorb information while driving, working out, or doing tasks that don't require your complete concentration. Flapcast is a web app that keeps your preferred podcasts in the cloud so you can listen to from any computer.
I use BeyondPodwith my Android phone to keep my two or three preferred podcasts ready, but there are several others I like to listen to occasionally. I don't want to automatically download these, but it's nice to have them available by going to Flapcast.
The web app also has a social component that you can friend other uses and see what podcasts they subscribe to. I couldn't rate that as the service is new and I didn't see anyone I knew there, but I'm sure it works as advertised. The search function lists a few podcasts, but I wasn't able to find old favourites like The Survival Podcast or Paul Wheaton's Permaculture Podcast via Flapcast's search. You can still add these podcasts manually via their OPML file in iTunes but that's a pain for those of us who don't like using iTunes in the first place.
It would also be nice if the web app could somehow remember your place in a podcast episode when you navigate away, but as it doesn't actually download the podcast there's no way to bookmark the stream.
These few flaws aside, Flapcast seems to work well and is good for listening to podcasts while at your computer if you're not a fan of iTunes. If you want to explore the social side of Flapcast, feel free to add me as a friend by searching for my name.