It is still in beta
After a one day sale recently, Google has decided that it was time to open the Google Glass sales for everyone in the United States. According to Google, anyone in the US can now buy the Glass Explorer Edition, as long as Google has it. The price however still remains $1500, which includes one Glass unit and a prescription lens frame or shades (depending on your choice).
So, if you were somehow waiting until now to grab Google Glass, head over to this link to buy one. The product is still called Explorer edition because it is still in beta phase and Google continues to improve both hardware and software for public release.
There is no word on when the retail version will go on sale or when Glass will head to other countries but if Google continues at the current pace, we might see the retail Google Glass in time for holidays.