I can monitor my machine on my iPhone.
The Iphone already has VPN settings, I just had to enter in the values.
Then I downloaded the Remote Desktop app:
http://www.mochasoft.dk/iphone_rdp.htm.
I used the Free version, and it works fine.
Oh, and the IT guy is a friend of mine, so he set me up with a virtual XP machine on the server, so I don't have to Lock my own desktop.
Works over WiFi, or with Cellular Data.
I haven't measured how much Data that it uses over Cellular yet.
PLC: Micrologix 1400
EtherNet/IP
I learned about AdvancedHMI over at PLCS.net
http://www.plctalk.net/qanda/showthread.php?t=66071