No sweat:
<html>
</head>
<title>Status Page</title>
</head>
<body>
<h3>System status:</h3></br>
<img src="healthy.png">
</body>
</html>
Otherwise, if it's internal only a Nagios dashboard could be good (if you're already using it).
We have LCD screens around the office with tiny $70 Android devices plugged in, they cycle through Nagvis dashboards of all our systems (e.g mail, internet), as well as check_mk (it talks to a couple of Nagios instances and has a prettier dashboard). Clients are impressed when they come visit and a couple have ordered similar/setup the same for themselves as a result.
Just 2cents
Gareth