There is a currency Microformat in proposal at the moment, and this page gives an example of how I would use it, along with some fancy formatting a la Argos (but without the tables).
Now only £129.00
<p>Now only <span class="currency"><abbr class="type" title="GPB">£</abbr><span class="value">129<span>.00</span></span></span></p>.currency {color: red;font-family: arial,helvetica;font-size: 30px;font-weight: bold;}.currency abbr, .value span {vertical-align: super;font-size: 11px;font-weight: normal;}abbr {cursor: normal;border: 0;}abbr:hover {border-bottom: 1px dotted black;}It works, and looks good. Now if only the others at Microformats could see that the direction they’re taking the proposal in is all wrong…