Sending confidential information such as passwords, account information and other sensitive data in emails and IM is not necessarily safe. That data is typically stored with remnants of the bits in places you don't need it to be.

File sharing. Droplr is the best way to share files from your Mac on the internet. Period.

ShareAppScreen is web service to share your iPhone home screen. You can manage your iPhone home screen by Dashboard Widget. And you can share iPhone screen to your friends.