[Brett Merkey]

@Justin:
You haven't fully described what you mean by "inline" superscripts or what your goal is in terms of usage. The style property to use normally to keep superscripts inline is vertical-align. Values of this is what you want probably.

Here are two rulesets I use all the time: the first SUP is for footnotes references and the like. The SUP with class "ordinal" is what I use for ordinal numbers (like 1st, 2nd, etc.)

sup {
   vertical-align: super;
   font-size: 0.8em;
   padding: 0 4px;
   font-weight: bold;
}
sup.ordinal {
   vertical-align: text-top;
   font-size: 0.8em;
   padding: 0;
   font-weight: normal;
}

vertical-align: text-top; forces the superscript text to stay below the normal top of a font height. It is a nice effect and probably what you want.