I won't say it is on hold...but it is on a temporary slow-down. I recently changed my MediaPVR system (decided to use the system intended for my BES). This allowed me to drop Got All Media and use GBPVR (for all the TV related stuff). A bit of a learning curve in skinning it to look similar to my Xlobby screens...but far and away easier than GAM. Also had other things going on too, but such is life.
The Glass skin was around 80% complete though minus some features like Blu-ray support and other HD support (I don't have alot of HD content nor a BR player). Also the TV portion is up in the air as my FTA setup is, or will be going down soon enough
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If you want to get started and get ahead of the game, I would suggest to download my Mirage skin and get xMenu working. Use the manual included with Mirage to get a good understanding of how to manipulate xMenu for your usage. Just remember that xMenu uses the xSend/xReceive plugin...and I define the distinct IP address of the HTPC, so you will have to change the conf.ini file in the plugins/xReceive directory, as well as go through the xMenu.ini file and change the IP/port of all the xSend commands to match what you define in your conf.ini. There are also a few xSend commands that will have to change in the Xlobby events as well.
I should try and get some updated screen shots though. Since the ones shown, I've changed the fonts to wipeout fusion (same used in ZS5 skin).
I'll keep you informed when it will be released.