Action item - H30 example replacement

As per this week's action item for me, here is a potential replacement
example for Example 4 in H30 (http://www.w3.org/TR/WCAG20-TECHS/H30.html).
All feedback appreciated.


A site allows users to provide feedback on products, when the user is logged
in, by clicking on the "Feedback" link in a product detail page. Other users
or the product manufacturer are able to provide a response to any feedback.
The feedback link displays an icon before the "Feedback" text when a
response to the user's feedback is available. The help information describes
this icon as a talking bubble containing quotation marks and includes the
icon itself as an example. The icon's text alternative in the help text is
"Response received icon". The same text alternative is used in the product
detail pages (when a response is available) to allow identification of this
icon through multiple modalities.

Example code:

<a href="prod_123_feedback.htm"><img src="response.gif" width="15"
height="15" alt="Response received icon" /> Feedback</a>