It's out, but not through ZAGG's site
The HD InvisiShield is available at Best Buy. I bought mine over a week ago.
I had actually called ZAGG about this just after ordering my new Touch 5th gen. "They said, yep, we don't have it. Email our company, and suggest they make it." JUST after that, I saw it in a Best Buy ad. Bizarre! Seems it's at least in Best Buy, but not on their OWN site!
My credit card was giving me 5% cash back for buying at Electronic Stores, so I went ahead and bought it at Best Buy.
BTW - After applying it, it looked awful at certain angles with the light reflecting off it. Lots of air still under the screen, even though I was careful to use their scraper to try and get the air out. The instructions said there will be bubbles, and to allow 2-3 days for those to work themselves out.
Guess what? They did! My screen looks and feels like a piece of glass, with no bubbles! Couldn't be happier with it.
P.S. - It is definitely NOT smudge proof.