Hi David,
while I delve into the module in the search for a better solution, you can edit the BlogList.ascx file like this:
<asp:TableCell Runat="server" ID="tdHeaderLink" ColumnSpan="2">
<asp:HyperLink cssclass="CommandButton" id="lnkBlog" runat="server" ResourceKey="lnkBlog">
View All Recent Entries
</asp:HyperLink>
<a href="http://..."><img src="http://www.yourdomain.com/desktopmodules/Blog/Images/feed-icon-12x12.gif" height="12" width="12" border="0" /></a>
</asp:TableCell>
This will show an icon linking to the aggregated RSS feed on the top of the blog list. Remember to insert the correct address for the aggregated feed in the href tag, and the correct domain in the img tag.
Best regards,
Dario Rossa