One thing though: is you're adding "RSS" support, use Atom for the feed, not actual RSS. Everything supports Atom that supports RSS, it's no harder to implement

One thing though: is you're adding "RSS" support, use Atom for the feed, not actual RSS. Everything supports Atom that supports RSS, it's no harder to implement, less ambiguous, less prone to breaking, and has a richer vocabulary that doesn't require you resort to pulling in additional vocabularies via namespaces. I cringe every time I see a feed that uses RSS and then pulls in Atom for some of elements. If you're going to do that, then just use Atom for the whole thing rather than building a frankenfeed.