My favourite iPhone app yet

Is Instapaper. It works like this:
1. Sign up at Instapaper.com and install their bookmarklet in your browser.
2. Install Instapaper on the phone via the store
3. When you see something good on the web but don't have time to read it, click the bookmarklet.
4. Open Instapaper on the phone: it downloads and converts the page and saves it locally so you can read it whenever you like, even offline.

It's genius, really.