Sort of off topic, but... I'm curious why people seem to be in love with "Circle Widgets". It's nice looking, but to me isn't anything special. I still use Beautiful Widgets. That app continues to be updated and recently had a major overhaul that makes it a lot more customizable (such as separate configuration options for multiple instances of the same widget)
As for the OTA path question... I think common sense would dicate that since Verizon DID push the update out (intended or not) and some people did receive it as such, that installing this JB ROM should be totally safe as far as that goes.
I am loving how much faster and smoother everything is. I'm using the 0G Maxx... so battery life already wasn't a problem, but I'm seeing the improvement there too.