@2007hummerowner found a dealer in North Carolina that's already accepting pre-orders on their website!
www.hummerchat.com
I went on their site and found this.

Just Joined
Hi all. I bought my 2007 Hummer brand new and have enjoyed every minute. It is still going strong. Honestly thinking of an electric version never occurred to me. Looking forward to learning more and giving my thoughts as a die hard Hummer driver.
I went on their site and found this.