Another, possibly easier option (assuming you have at least one Windows PC on the network) is to run a little program called "Servers Alive" (
http://www.serversalive.com/salive/features.asp) .
This program can check email servers (POP3 and IMAP), Web servers, streaming servers (Windows Media, Quicktime and Real), Database servers (Oracle and MS SQL). It can be customised for other servers.
If something should happen, it can attempt to restart the affect service, or it can contact you via email, pager, SMS, ICQ, MSN or Aim. It can also update a WAP or HTML page for you.
The free version can also log any failures to an ODBC database.
The only restriction is you can only set 10 items to monitor in the free version.