Is
http://robs.homelinux.co.uk the kind of thing you want? It shows the status and everything of my little server. If it's uptime you want in an image form to show on a remote website then try Sigx:
http://sigx.yuriy.net/, you can run that on your server which will upload the stats to the sigx server an dynamically create an image while you can then call up on your webpage like: