Instapaper now has a full API for developers to build on.
One catch: for access to the full API, customers must be an Instapaper subscriber. It’s only $1/month, of course, but that’ll cut down on potential customers for third-party Instapaper-based applications. Marco’s got to make a living, though, so it’s hard to criticize this requirement. Smart.
There’s a lot of great applications this will allow. I am excited.