When I went to go purchase Glass for the first time, my bank declined the charge as my account had a transaction limit of $1500 (which I didn't know about at the time). Because of that, I had to postpone buying glass for a week until I could get things settled out with my bank and get that limit upped to $2000 so that I could purchase Glass without problem.
So I emailed Glass support and asked if they could extend my Glass invite so that I could have time to situate things on my end. In their response, they said the following: "I was able to extend your invitation until the end of April, but Glass goes fast so I’d suggest using your code soon!" That leads me to believe that if Glass is going to be released sometime in a few months, it won't happen until after or around the end of April.
So there's that.