Culled from this list. I will certainly bookmark and use these:
TinyChat – make a chat room, instantly, share with a link, it disappears when done.
You used to have to hack somebody’s box to setup your own disposable IRC,
now there are services for it! A subversives dream!
Whspr! - temporary e-mail address. Simple. Easy. Slick.
FriendPaste – like pastebin, but for programming code snippets.