The only "clues" we have from someone on Twitter, from a recently opened account (August 18), is from @JohnsonThrimp a variant of a known alias (Thrimp Johnson) for Evan given to us by Wired. The @johnsonthrimp account today added his location as London. Anyone can put any location on the Twitter account. The "clues" Thrimp have mostly pointed in the direction of Sacramento, California. Evan's FastTrak toll bridge account has him leaving San Francisco heading possible towards Sacramento.
I don't know if @johnsonthrimp is Evan or someone helping Evan. It's odd that the two times Evan has not masked his IP address, the locations are in southern California, and the clues we have from @johnsonthrimp lead us to northern California.
Just some thoughts, feel free to draw you're own conclusions.