Using MobileCast and MobileRSS?

[marineoceania]

How do I add podcasts to MobileCast and RSS Feeds to MobileRSS? I really have no idea how to use RSS and I feel like an idiot because its Really Simple Syndication hahah. Every time I put a URL in it says "invalid feed"

[ein]

make sure you are entering the actual url for the feed, for example: do not enter www.diggnation.com instead enter http://feeds.feedburner.com/diggnation