I have been using a VERA 2 with the Arduino usb gateway for two weeks now. I have two nodes, one with a motion sensor and the second node with a humidity/temp sensor. They are working well. I had to reload the VERA UI several times after I uploaded the files to VERA. After the reboots the gateway worked properly. I have more Arduinos and sensors on order, these things are great. Other than affirming that a VERA 2 will work I can't be of much more help.
