Stumblr.

My favorite iPhone app, Instapaper, is about to get a lot bigger.

It was a chicken-and-egg thing for me: I’m resistant to buying a tablet device without an amazing reader; but who is going to develop something excellent for a platform that doesn’t exist yet? But as Instapaper’s developer points out, “an iPad without native Instapaper Pro is not a device I want to own.” Thanks, Marco — now it’s a much easier decision.