I'm looking for a good podcast app. I have a subscription to one podcast that I have to enter user and password. Most apps I have found won't support this.
Media Fly is also an option. It gives you the ability to manage your podcasts from a website. I also listen to one podcast that requires a user name / password. I used iTunes before. Mediafly does not give you the ability to enter the password (by the way, Listen does, and I don't think it is that bad). However, I was able to subscribe to the podcast on the website. I suspect that I had a cookie stored on my drive from iTunes that did not require me to enter any passwords.
Mediafly is free.
I've been using Mediafly. I tried a couple and even though it can be a bit buggy at times, I've been happy with it. The developers are also VERY responsive and helpful and that always endears me to apps. I like that it is also a website, so it is easier to add stuff from my computer.
I have no idea if it supports passwords.
It is free for audio only and paid ($.99 ) for audio and video.
eta: PatG beat me to it!
I would recommend BeyondPod. it does this, and will also schedule updates, as well as turn off 3G and turn on wifi to do update. All automatically. Very nice app. Also check out the BeyondPod Google Group, dev is in there a lot and always tries to help out best he can.