Nieman's Laura Hazard Owen writes about Substack's new RSS reader app for the iPhone. I think there's a chance we'll see a return to the more thoughtful blogosphere of the late 90s and early 00s, and I think Substack is part of it. I also would love to know, without having to dig through the app, if they've extended RSS, added a new namespace with Substack-specific data, or if it's straight RSS with common namespace extensions. Also it looks like their reader requires items to have titles. Is that so? I've been playing around with some new reader ideas, no claim that anything will ship, but one thing we have to accommodate is title-less posts, otherwise we're going to end up right back where we are now with a division -- the quick stuff on Twitter, and only long stuff in RSS. That was a divide forced on us by the now long-defunct Google Reader. Also factor in the idea that Twitter might be about to add longer titled posts to their ecosystem. #