From Elon Musk's Twitter account yesterday, "Official Gigafactory address to be: Electric Avenue, McCarran, Nevada". If you're not familiar with the song Electric Avenue by Eddie Grant, you can check out the song here. It's great to see Elon and Tesla with a sense of humor and playfulness.
A positive economic report for the Gigafactory's impact on Nevada was released this past week. The report noted that the Gigafactory would "be built in four phases. The first phase would create 700 jobs in 2015. The second phase would add 1,000 more jobs in 2016. Another 3,000 jobs would be added in 2017, with the remaining 1,800 jobs starting in 2018." So, it seems possible that limited battery production could start much earlier than 2017.
If you haven't watched the Nevada press conference where the Gigafactory was announced, Tesla has uploaded an official video (25 minutes). If you're pressed for time, you can view just Elon Musk's comments starting at 12:48 by clicking here.