Pinbook is an iOS app for viewing and adding bookmarks to Pinboard. The latest version is a significant update.
Collin describes all of the latest features.
It already had crazy-fast bookmark syncing and somehow 1.1 is even faster. I have 8000 bookmarks and syncing all of them takes about three seconds.
Now there's also tag auto-suggestion when adding new bookmarks which is super handy.
Oh, and don't forget there is a very good url-scheme too.
The easiest way to use Pinbook is to just copy a URL to the pasteboard and switch into Pinbook. The app will offer to bookmark the url. Boom. Done.
I bought Pinbook as soon as it came out. I'm now on the betas and get tingly every time a new version comes out. Let's just say there is active development and good stuff happening.