pageoneresults - 5:19 pm on Mar 5, 2007 (gmt 0)

But what advantages does <kbd> give you?

The Keyboard Element allows you to use a "correct" semantic wrapper. For example, the <kbd> element would be appropriate when writing instructions for using a keyboard.

I tend to avoid "non-mainstream" HTML, as it can whack support for older browsers, and support for older browsers is the #1 thing you can do to make your site accessible.

Actually these are HTML 4 Elements and Attributes that are supported by all browsers. There are elements and attributes which are Deprecated and those are marked as so on the links provided above.

I tend to avoid "non-mainstream" HTML.

I guess it all comes down to what type of visitor you are targeting. That would definitely determine the type of markup structure you utilize.