Safe Mail is a free tool that will convert any email address into an image. All you do is enter the address, hit Go and an image with your email address in it will be created. A spambot for example won't be able to read your email address, since it's no longer actual text in the page's source code, it's an image.
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iPhone Home Screen Contacts allows you to place a short cut to dial your favorite contacts on your iPhone's home screen.