There are a number of great iphone applications available for sysadmins who doesnt always enjoy carrying a laptop with them everywhere they do. I wish we had iphones when I used to be a sysadmin 5 years ago, it would have made a lot of simple tasks like rebooting server or checking up on system usage or just monitoring systems in general a lot more convenient without having to sit in front of the computer all the time. Webmasters, sysadmin or even hobbyist server owners will hopefully find these iphone applications very useful just as I did.
1) Network Ping: A nice little application to maintain or debug network problem on Local Area Network with the ability to access router by Telnet console.