How bout this
just below these lines in the Site Visitors block file
Code:
$content .= "<img src=images/visitors/rpriv.gif>"._SV_READ."".$MesRead."
\n";
$content .= "<hr color=\"#000000\" size=\"1\">\n";
add this
Code:
$content .= "<img src=images/visitors/priv.gif> <a href=\"modules.php?name=WebMail\">Web Mail</a>\n";
$content .= "<hr color=\"#000000\" size=\"1\">\n";
Makes a nice Wbemail link for users once they are logged in.