To get WAI-AAA validation, you have to include a default value in the inputs. You can do this now. But when you click on the input box, you have to delete the default value before writing anything. Some code will clear the value of the inputs boxes when you click them:
<input type=”text” id=”author” name=”author” value=”Author” onfocus=”if (this.value == ‘Author’) {this.value = ”;}” onblur=”if (this.value == ”) {this.value = ‘Author’;}” />
It is like the search input on this page, on top rigth corner (Search WorPress.org). I second this too, with the pre-focus color on light grey.