would be cool 'extra' feature to have
using some of the same code to create the 'Publish' button and adding something as seen here may work, I will play a little today and see what happens
<input type="button" value="Reset Form" onClick="this.form.reset()" />
Using an HTML ‘Reset’ button is an easy way to reset all form fields to their default values. For instance, the code snippet below shows an <input> field of type “reset”, which on being clicked resets all the form fields:
<input type="reset" value="Reset Form">
In fact, we could also use the form’s reset() method to achieve the same effect, using a simple button element:
<input type="button" value="Reset Form" onClick="this.form.reset()" />
and a site with some js tricks
http://www.javascript-coder.com/javascript-form/javascript-reset-form.phtmlADDED INFO
I added a bit of code to the item-post.php and its works, may have to play around with styling a bit
towards bottom, find <button type="submit" class="ui-button ui-button-middle ui-button-main">
and add as I did (see pic)
<div class="controls">
<button type="submit" class="ui-button ui-button-middle ui-button-main"><?php if($edit) { _e("Update", 'canyon_lemon_lime'); } else { _e("Publish", 'canyon_lemon_lime'); } ?></button>
<input type="button" class="ui-button ui-button-middle ui-button-main" value="Reset Form" onClick="this.form.reset()" />
</div>