I use Pulse sometimes — though I definitely prefer their web app. The separation of channels on their iOS app seems to me absurd — and in exact way of an informational silo.

Ok, but what about readers like Flipboard? People like to group their content anyway — they just don't want to know anything about rss-geekery or obscure protocols. Just add a source (or simple topic, like in a very popular but gloriously defunct Summly) — and there you go.