Solo half way through.
I met up with Mikey along the way and had a bit of fun there.
I did also meet up with a large cohort of people consisting of DarkHender, ClockworkMyr, rosekill and some people I can't remember.
I joined people, and left people, I eventually ended up making a small fort in the corner of the teaser map, allowing people to come in and stay out of rads, or grief.