I was also looking at the Ionics plugs and decided to email there support team, this is wat I got back after a couple of days:
"Thank you for your interest in our plug computers. You must have visited already our website http://www.ionicsplug.com
and read through the different models and their features. The Nimbus 100, Nimbus 200, Stratus and Cirrus can now be ordered. Except for the Nimbus 100, which can be ordered online, the other models will have to be ordered through this email for now. May I know your intended application of the unit for our information. Let me also know how many you need so I can send you a quote for that."
Hope this helps.