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in reply to 3Re: My favorite HTML font style tag is...
in thread My favorite HTML font style tag is...

Ya, my XHTML is garbage, thanks for reminding me.

The reason for using <em> over <i> or <b> in this situation is the idea of structure vs. presentation.

In an ideal world, your HTML would only mark up your content structurally ...

Why bother, you ask? (Well, even if you don't....) Because not all devices that render HTML pages are visual -- example, if someone is looking at your page on a Palm Pilot, then the palm can interpret emphasis the best way it can. Also, search engines are better equiped to deal with structural markup -- markup that signifies what type of data something is.

Once you can do all your mark-up structurally, you can use CSS to have your HTML visually styled in the user-agents that can handle it, and the ones that can't will still be able to digest it easily.