OneShar.es lets you share confidential text. Submit your top secret info via the website, iOS or Android app and you’ll receive a URL to share. Once someone accesses the URL, your message is displayed once then immediately deleted from OneShar.es servers.
Needless to say, your text is encrypted before sending to OneShar.es, and stored in encrypted form.
Droplr is a fantastic tool for sharing pictures, text or links. It has a more awesome iPhone app.
I use it for sharing on Twitter and for bookmarking. Its statistics shows how many views had the shared item.
And it is free.
The web interface is also very nice. Drag and drop.