Google Glass is Google's latest product which not yet on the market. But you can get one (Preorder) and be the first few who will get the awesome product. There are a very small number of glasses for sale, to get one you will have to apply for this via Google+ or twitter and here is how (Remember You must be at least 18 years old and live in the U.S. to apply )
Using Google+ or Twitter, tell us what you would do if you had Glass, starting with the hashtag #ifihadglass.
and the rules are
Your application must be 50 words or less
You must include #ifihadglass in your application
You can include up to 5 photos with your application
You can include a short video (15 secs max)
Be sure to follow us on Google+ (+ProjectGlass) or Twitter (@projectglass) so that we can contact you directly
You must be at least 18 years old and live in the U.S. to apply
The deadline for applications is February 27th
If you are chosen you will have to pay $1500 + Tax
Read more here