Hello,
I think that the current v1.7 of the Nest plugin will fail to start up on UI7 owing to a stupid and minor bug in the plugin. If the plugin complains that you aren't running the minimum required Vera firmware (1.5.408), please then try to use the attached file by going to Apps -> Develop Apps -> Luup files, uploading the file and choosing Restart after upload (or if this UI has changed in UI7, the equivalent).
I don't expect to be running UI7 as soon as it comes out, so I rely on plugin users to tell me if there are any problems. Thanks for your help!
Regards,
watou