Google launched these "heads-up display" type glasses under the project name, "Project Glass".. well who gives two shits about the glasses (I’m sure they are way off from market, reality, etc. otherwise they look cool), what did they do domain wise?
They offered up this video to show off the glasses in action (i’m sure a TON of editing went into the video)
At the end of the video, like a TV commercial.. the destination domain to "learn more" is displayed as…. G.co/projectglass

G.co is used as a URL shortner by Google. (Update: based on some stats I am seeing, many people are typing "g.com/projectglass" trying to find the project page, clearly a BIG problem for .co domain owners that do not own the matching .com of what .co domain they are using.)
The shortened URL leads to https://plus.google.com/111626127367496192147/posts which is the Google Plus page for the project.
ProjectGlass.com (even though a code name) is owned by HugeDomains.com and is for sale currently at time of posting for $1,195
ProjectGlasses.com just was on auction (March 25) at Auction.GoDaddy.com and did not get any bids. The domain is currently in redemption period. Why did I include this domain? Because they are GLASSES and I actually typed g.co/projectglasses and ended up on a 404 page at Google. If I did this, others will as well.
GoogleGlasses.com was registered almost 1 year ago on 4/25/2011 at GoDaddy.com and is registered out until 2021. Not something that you see very often (10 yr registration), but the whois is privacy protected. The domain was registered prior to 2011 but it expired and was removed from the registry in 2011. I wouldn’t expect Google to own this or they would likely have forwarded the domain to the plus page.
IMO, if these do hit market at some point, the common sense term to relate to them will likely be "Google Glasses". They could come up with a fancy name for them but we shall see. At this point, it doesn’t look like they cared to cover any bases domain wise with project glass.

