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Every user has an RSS feed for their public Pens now (as well as their popular ones). Here's mine.
We don't have comprehensive RSS coverage of CodePen just yet, but we pick away at it sometimes and keep it documented here.
We've actually had these new feeds up for a few weeks, but needed to find a place to expose them on user profiles. We did this by moving some stuff around and making a footer area on profiles. If you're PRO (and thus do not see ads), you're profile (and everyone else's) look like this:
If you aren't PRO (and someone who isn't PRO is looking at your profile) the ad is there but has moved down into the footer area:
If you're PRO, remember you can apply custom CSS to your profile too, making it whatever level of awesome you choose. And speaking of advertising, here is information on that.